Blog - Page 2 of 21 - Nature Center at Greenburgh

October 3, 2024January 7, 2025 Cathy Ludden Around the Grounds, Native Plants

Where Do Fireflies Sleep?

If you’ve known the enchantment of fireflies blinking through a summer evening, perhaps you’ve wondered where they come from, why they blink, and where they go when the sun comes up. Have you also wished that more of them would light up your own backyard? Here are a few tips!

Although we only see them in summer, autumn is a critical time of year in the life of these magical creatures. What we do in our landscapes in the fall determines the health and well-being of the firefly population for the following summer.

There are more than 150 species of fireflies in North America. In the Northeast, the most common are in the Photinus group, which includes about 15 different species. To find their own species in the dark, fireflies have adapted a highly specialized method of communication. The blinking light display that so charms humans is part of the firefly mating ritual!

*Photinus pryalis* is about half an inch long and emits a yellow-green flashing light.

Each species of firefly has its own distinctive flash pattern, like a message in Morse code, to signal potential mates. Depending upon the species, flashes may be single or in multiples, short or long, and spaced at specific intervals. The characteristic pattern helps each species find its mates. The males fly around blinking their distinctive pattern. Females rest on the ground, or on low vegetation, and answer by flashing back at the right time. In this way, the female chooses her mate – if she doesn’t flash back to a passing male, he can’t find her in the dark!

Fireflies are beetles with wings hidden under a hard shell.

The flashing light, or bioluminescence, is caused by a chemical reaction in the insect’s lower abdomen, and varies in color from species to species. The “lantern” on the male is larger than on the female, usually covering two segments of the body rather than just one in females.

The blinking part of a firefly is the lower abdomen.

Because fireflies use their flashing light pattern to find mates, outdoor landscape lighting can be a big problem. Darkness is necessary for fireflies to find their mates, and artificial lights confuse them, interfering with the ancient mating ritual. So, you can help just by adjusting your yard lights to be sure it’s dark when fireflies are active in summer. Use only motion-activated lights, or low-wattage yellow or red lights, and use timers to turn lights off completely at the earliest hour possible. Not only does a dark yard help fireflies find mates, it also makes their magical display easier for you to see and enjoy.

So, after a romantic night, where do fireflies sleep?

Adult fireflies spend daylight hours resting at ground level in vegetation where there is humidity and cover. At dusk, you can see them rise up from the low vegetation and drift higher as the sky darkens. A few days after mating, the female lays fertilized eggs on or just under the surface of the ground in the same damp areas where she has been hiding during the day.

An adult firefly resting on butterfly milkweed.

So, ground and soil conditions are critical for firefly populations. Avoid disturbing the ground by mowing, or using high-powered leaf blowers, or spraying pesticide. If the female firefly finds a good spot, under trees or shrubs, or in a patch of native perennials, in tall grass, in leaf litter, or under a loose brush pile where her eggs won’t be disturbed, then the eggs will hatch in two to four weeks, emerging as hungry larvae.

Firefly larvae need a damp, undisturbed habitat where they can
find and feed on multiple garden pests.
*Photo: Ken Johnson, University of Illinois Extension*

Firefly larvae don’t look anything at all like the adults we recognize, (though the larvae do glow in the dark!). The larvae feed until the end of summer on soft-bodied insects, including slugs, snails, worms, other garden pests, and even mosquitos — which makes fireflies extremely beneficial insects! Then in the fall, the larvae must find a safe place to hibernate for the winter.

And that is why our fall landscape practices are critical. If we insist on keeping very tidy yards, where every fallen leaf has been blown and bagged for removal, future fireflies hiding as larvae in the leaf litter, or in soil protected by those leaves, will be lost. If we cut our flower beds to the ground and send away the dead stems and leaves, not only fireflies, but also many species of butterflies, moths, and native bees will be doomed with no safe place to hibernate for the winter. Cutting ornamental grasses to the ground, and mowing lawns short before winter, also dries out the damp ground where firefly larvae hibernate, reducing their chances of surviving until spring.

Leaf litter and uncut flower beds protect firefly larvae until spring.

If firefly larvae overwinter safely, and are not destroyed by overly-aggressive spring garden clean-ups, they will emerge hungry and ready to hunt various garden pests well into summer, when they finally pupate, becoming adult fireflies. If allowed to mature in safe habitat, fireflies will again delight children of all ages when summer arrives.

Fireflies introduce children to the wonders of nature.
*Photo: Bernheim Forest and Arboretum*

Though catching fireflies may be one of the chief joys of childhood, it is best to use a net to avoid hurting the insects’ soft bodies. Don’t squeeze their abdomens, and be sure there is no insect repellant on your hands. You can put fireflies in a jar for an hour or two to observe them more closely, but add a bit of wet paper towel to keep the humidity up, and be sure to release them where you found them well before morning. They will not survive long in captivity.

Firefly populations are decreasing across the US, but you can help by following many of the same practices that protect pollinators:

Provide safe habitat by planting trees, shrubs, grasses, and flowering perennials in parts of your yard, and allowing leaves and dead vegetation to stay there – especially over winter and into spring.
Do not use pesticide on lawns, and avoid poisons meant for slugs and snails. Do not spray for ticks or mosquitos under shrubs and trees where fireflies hide. So-called “natural” and “organic” insecticides are still lethal for fireflies, butterflies, moths, and bees.
Reduce or eliminate unnecessary outdoor lighting during the summer when fireflies and moths are active. Use motion-activated lights or timers, and aim lights downward wherever possible.

By taking these simple steps, we can protect the magic of fireflies on sultry summer nights for many generations to come.

*Photo: Judd Patterson @Juddpatterson.com*

THIS BLOG IS WRITTEN BY CATHY LUDDEN, CONSERVATIONIST AND NATIVE PLANT EDUCATOR; AND BOARD MEMBER, GREENBURGH NATURE CENTER. FOLLOW CATHY ON INSTAGRAM FOR MORE PHOTOS AND GARDENING TIPS @CATHYLUDDEN.

Share this post:

TO SUBSCRIBE TO THE BLOG – AND NOTHING ELSE – ENTER YOUR EMAIL BELOW

August 8, 2024January 7, 2025 Cathy Ludden Around the Grounds, Native Plants

What is it Worth?

“Around the Grounds” is published by the Greenburgh Nature Center to encourage readers to garden ecologically to help save bio-diversity. This post has a different purpose: to encourage readers to help save the Greenburgh Nature Center itself. We are asking only for your voice. Please sign the petition below or contact our Town officials directly. Thank you!

Most Baby Boomers will recall a wild outdoor place somewhere near where they grew up: a patch of woods, a pond, a swamp, or maybe an open grassy field where fireflies congregated at dusk. Days spent catching frogs, finding salamanders, maybe spotting a garter snake or a turtle, and definitely seeing lots of monarch butterflies, were all part of what made childhood summers so magical.

But if you ask those same Boomers what happened to the wild places in their old neighborhoods, chances are they will say, “long gone” – lost to development.

Before World War II, just 13% of Americans lived in suburbs. By 2010, however, suburbia was home to more than half of the US population! Inevitably, corporate offices, shopping malls, warehouses, schools, sports facilities, local government offices, and the roads, parking lots, and altered landscapes servicing this vast migration, eliminated the undeveloped “wild” places of childhood memories.

Today we are warned that our kids are suffering from “nature deficit disorder.” We hear that the average 5th grader can identify hundreds of corporate logos, but only two or three species of plants, including common trees. And it is shocking how many kids are terrified of completely harmless insects and animals because they’ve had no interaction with them. Suburban adults are often part of the problem: worried about mosquitos and ticks, they spray pesticides that wipe out fireflies, butterflies, bees, and any other insects that might provide food for birds — or learning experiences for children. The resulting sterilized landscape offers little opportunity for discovery of nature.

Suburban yards are routinely treated with toxins

But if you are lucky, there may be a good local nature center where you can find the cure for nature deficit disorder.

The Greenburgh Nature Center is such a place. Surrounded by suburban homes, schools, golf courses, and a busy commercial corridor, the 33-acre grounds of the Nature Center offer forest, meadow, and wetland habitats where birds, butterflies, bees, and countless species of insects and small animals can be observed in nature.

Visitors are free to wander and observe on their own, and children make eye-opening discoveries every day at the Nature Center. Highly-educated and skilled naturalists on staff offer insights and interesting information to children and adults about animal behavior, ecology, native plants, and the historical use of the Nature Center’s land by indigenous peoples.

image_50802177 (1) — Naturalist with visitors

For fifty years, the Greenburgh Nature Center has been a model public/private partnership inspiring a passion for nature and enhancing the quality of life in its community. The “public” part of the partnership is the site: a protected piece of land and a 100-year-old Manor House acquired by the Town of Greenburgh with funding help from the State of New York.

The “private” part of the partnership is a 501(c)(3) non-profit educational organization called “Nunataks, Ltd.” that provides all of the programs and services at the Nature Center. Nunataks employs the staff naturalists, who with degrees and experience in multiple nature-education disciplines, run school programs, day camps, after-school activities, birthday parties, animal husbandry experiences, and seasonal nature events for the whole community.

image_50802177 (2) — Naturalist explaining seasonal seed dispersal

For 50 years, this public/private partnership has been incredibly successful! The Nature Center welcomes over 100,000 visitors annually and runs programs for over 12,000 students each year from multiple area communities. Outdoor experiences on site include forest trails, a native-plant meadow with a live butterfly exhibit, native plant gardens, a vernal pond, a playground, a barnyard with farm animals, beehives, and a replica Native American wigwam and long house with educational exhibits about indigenous peoples.

Indoors, visitors can meet numerous live animals from mammal, reptile, amphibian, aquatic, and avian species tended by trained volunteers and naturalists who explain their characteristics and supervise their careful handling by visitors. There are also science displays, and event spaces for programs, birthday parties, educational crafts, and adult classes. All of these experiences are provided on site by Nunataks, Ltd., the educational non-profit organization.

Adults attending a native plant meadow tour

Sadly, this incredible community resource is now threatened by a breakdown in the public/private partnership that has served the community so well. The Town of Greenburgh has balked at renewing its contract with the non-profit Nunataks, Ltd. to continue operation of the Nature Center. Under the terms of the existing 25-year contract, the Town currently pays Nunataks, Ltd a fee that covers less than 20% of costs of operating the Nature Center. The remaining 80% of the Nature Center’s expenses are covered by membership fees, grants, donations from individual community members, and revenues from programs run by the non-profit staff. The amount currently paid by the Town of Greenburgh is no more than ¼ of 1% of Town’s annual budget. The Town Board, however, has declined to renew the contract at that minimal cost. If the contract is not renewed, the Greenburgh Nature Center must cease operation.

What is the value of the Nature Center to the community?

What is the benefit of hands-on nature education in an oasis of wild space for families surrounded by manicured landscapes and pavement? What does it mean to a child to see a butterfly emerge from a chrysalis? What is it worth to teenagers to discover that complex plant/animal relationships in nature are real and visible and not confined to textbooks? What is the benefit of a few quiet moments of bird-watching in a wildflower meadow?

If you value these things, please help us by signing the petition below. If you are part of our community, please contact the Greenburgh Town Supervisor and members of the Town Board urging them to renew the Nature Center’s contract.

What is the value of a moment in nature?

And if you live in another community and are lucky enough to have a resource like our Nature Center, do whatever you can to support it and preserve the value of nature education in a patch of wild space. We all thank you.

Click here to sign the petition.

THIS BLOG IS WRITTEN BY CATHY LUDDEN, CONSERVATIONIST AND NATIVE PLANT EDUCATOR; AND BOARD MEMBER, GREENBURGH NATURE CENTER. FOLLOW CATHY ON INSTAGRAM FOR MORE PHOTOS AND GARDENING TIPS @CATHYLUDDEN.

Share this post:

TO SUBSCRIBE TO THE BLOG – AND NOTHING ELSE – ENTER YOUR EMAIL BELOW

July 26, 2024January 7, 2025 Cathy Ludden Around the Grounds, Native Plants

The Shape of Hydrangeas

It’s hydrangea season and they are everywhere! But where are the bees?

Have you noticed that bees happily buzz around some hydrangeas while ignoring others? The difference is striking with these two hydrangea shrubs seen blooming side-by-side:

What accounts for the difference?

You might reasonably guess that native hydrangeas would be more attractive to native bees than Asian varieties, because that is often the case with other plants. Insects in North America usually prefer the plants with which they co-evolved, so non-native species are much less useful to them. But in the video above, both shrubs are non-native hydrangea varieties. So, what’s the difference to the bees?

When it comes to hydrangeas, it’s the shape of the flower that matters – at least to bees! And since 25% of native bee species are in sharp population decline, we really must care about what’s important to bees.

Hydrangea flowers, properly called “panicles,” are typically one of three shapes: “mophead,” “lace-cap,” or “conical” (cone-shaped).

In nature, hydrangeas have either lace-cap or conical forms composed of many tiny fertile flowers accompanied by larger showy 4-petaled flowers that are sterile. The only purpose of the sterile flowers is to attract the attention of pollinators, directing them to the real flowers – the tiny ones loaded with pollen and nectar.

Large sterile flowers draw attention to the tiny fertile
flowers inside

Pollinators find nectar and pollen in the fertile flowers

For bees, the sterile flowers on hydrangeas are just advertising. For humans, the sterile flowers are the pretty part. So, for hundreds of years, humans have been manipulating hydrangeas with selective breeding and genetic modification to create panicles with more showy sterile flowers and fewer — or zero — fertile flowers. The heavily-modified hydrangeas are spectacular to human eyes, but useless to pollinators.

Some of the showiest mophead hydrangeas have no
fertile flowers at all, and produce no pollen or nectar

The intentional modification of hydrangea flowers has crossed continents and hydrangea species. Many of the most popular hydrangeas in gardens today are mophead versions developed from the Asian species, Hydrangea macrophylla, or big-leaf hydrangea. You recognize these as the big round flowers that are pink or blue depending on the acidity of the soil, but they are also available in white, pale green, hot pink, and other colors. In fact, there are countless varieties of heavily-modified Asian hydrangea species on the market, including the popular tree form “Pee Gee” and the enormous conical flowers of “Limelight,” both modifications of the Asian Hydrangea paniculata.

Native North American species have been similarly modified to create fancy flowers. Hydrangea arborescens, or Smooth Hydrangea, is native to forests from New York to Ohio, and south from Oklahoma to Georgia. In the wild, it has flat-topped clusters of tiny white fertile flowers with occasional mutations adding a few sterile flowers scattered around the outer ring.

Natural form of the native *Hydrangea arborescens*

To make its flowers more appealing to humans, growers selected the mutated flowers and modified them dramatically to increase their number and size, eventually eliminating the fertile flowers altogether. The result was a plant with enormous mophead flowers that they labelled ‘Annabelle’ hydrangea, and introduced to the American market in the 1960’s. Since then, many other named varieties (‘Snowball,’ ‘Incrediball,’ ‘Invincibelle,’ etc.) have been developed to appeal to gardeners. Unfortunately, these showy mophead forms offer nothing to bees because the fertile flowers have been manipulated out of existence.

‘Annabelle’ and other cultivars of Smooth Hydrangea
have made this native plant useless for bees.
*Photo from nursery advertisement*

Even our excellent native shrub, Oakleaf Hydrangea (Hydrangea quercifolia), has been targeted for flower modifications by growers. Oakleaf Hydrangea naturally has large conical flowers that emerge white and gradually turn pink. They are beautiful and loaded with fertile flowers that are an important source of nectar and pollen for bees. (For more information on Oakleaf Hydrangea, click here.)

Oakleaf Hydrangea is native to the Southeastern US,
but grows well in gardens throughout the mid-Atlantic region

Conical flowers of Oakleaf Hydrangea are beloved by bees

Apparently not satisfied with an already excellent and garden-worthy native plant, the nursery industry has introduced cultivars of Oakleaf Hydrangea with flowers so altered that they have no remaining value to bees.

image_50605569 (1) — A double-flowered version of native Oakleaf Hydrangea
has eliminated fertile flowers completely

Dense conical flowers with no interior fertile flowers on
this Asian hydrangea do not support bees

Open conical flowers with large clusters of fertile flowers inside, like natural Oakleaf Hydrangea flowers, are a feast for bumblebees and other pollinators. And lace-cap flowers, whether Asian or native, because they are formed with large clusters of fertile flowers in the center, attract many species of bees.

An Asian lace-cap hydrangea visited by bumblebees

In a recent 5-year trial at the Mt. Cuba Center in Delaware, 29 cultivars of the native Smooth Hydrangea, including 16 mophead and 13 lace-cap varieties, were evaluated for garden appeal and performance. https://mtcubacenter.org/lacecap-hydrangeas-take-top-marks/ Investigators also monitored each of the plants for pollinator visits, extrapolating the results over the growing season. They found that lace-cap flowers were visited by pollinators at 3½ times the rate of mophead flowers. Although they did not report on the duration of visits, they did observe that bees approached the mophead flowers, but apparently did not often find reason to stay.

So, if we care about bees, flower shape matters!

For gardeners who love hydrangeas and also care about bees, the best bet is to include lace-cap and open conical flower forms with plenty of fertile flowers in your garden. Native Oakleaf Hydrangeas in natural form and native Smooth Hydrangeas in lace-cap form (like ‘Haas’ Halo’) are widely available at nurseries. And if you love the bright colors and playful shapes of the Asian lace-caps, they are a much better choice than the mopheads.

Go ahead and enjoy your mophead hydrangeas – they are harmless and we all love them. But think about adding a few lace-caps or conical forms with lots of fertile flowers for our bee friends.

You’ll love them, too!

THIS BLOG IS WRITTEN BY CATHY LUDDEN, CONSERVATIONIST AND NATIVE PLANT EDUCATOR; AND BOARD MEMBER, GREENBURGH NATURE CENTER. FOLLOW CATHY ON INSTAGRAM FOR MORE PHOTOS AND GARDENING TIPS @CATHYLUDDEN.

Share this post:

TO SUBSCRIBE TO THE BLOG – AND NOTHING ELSE – ENTER YOUR EMAIL BELOW

June 27, 2024January 7, 2025 Cathy Ludden Around the Grounds, Native Plants

Walk This Way…

A paved walkway to the front door is one of the most common features of suburban residential landscapes. And it’s important! It is a visitor’s first impression of your home and a major element of “curb appeal.” Landscape design professionals recommend planting your walkway to welcome visitors and visually direct them to the correct entrance while giving them something interesting and beautiful to see along the way.

A well-planted entry walk guides visitors to the front door.

The entry path to the Greenburgh Nature Center in spring.

But a paved walkway presents multiple challenges for landscaping. The process of paving, whether with stone, concrete, brick, or asphalt, often damages the adjacent soil, leaving it compacted, dry, and rocky with bits of concrete and masonry that can significantly alter soil pH and create poor planting conditions.

New construction of paved areas can leave depleted soil.

Paved surfaces are also warmer in summer and colder in winter than the surrounding soil. Pavement reflects summer heat onto adjacent areas and can hold that heat long after sunset. Frozen pavement, on the other hand, can be even colder than surrounding air and soil temperatures, and snow cleared from walkways often includes salt or ice-melting products damaging to plants. With these extremes, it can be challenging to find plants that will look good and survive year-round.

Understandably, many suburban homeowners opt for planting nothing at all along walkways.

Others plant a row of annuals every summer only to watch them wither and die long before fall (New Guinea impatiens anyone?). Most annuals are tropical plants that evolved in the understory of rainforests. The harsh conditions along a paved entry path are a far cry from the rich, wet soil in the shady jungles of equatorial New Guinea!

So, what can you plant along an entry path that will survive tough conditions through summer and winter, and still come back strong in the spring?

Consider plants that evolved in regions with baking hot summers, freezing winters, poor hard packed soil, and weather that can alternate between drought and flood. America’s great prairies and dry meadows are the original habitats of a vast array of hardy native plants. With variations in annual rainfall, soil depth, tree cover, and elevation, an incredible variety of grasses, flowering plants, and hardy shrubs evolved in those challenging landscapes. These native plants are ideal for the conditions so often found on paths from sidewalks and driveways to front doors throughout suburban neighborhoods.

The bonus is that these plants also feed native bees and butterflies and need very little care. Many of them already have been featured in prior posts of this blog. Take a look at these plants as you consider re-designing your entry path, and follow the links below for more information and photos:

Blue-eyed Grass (*Sisyrinchium angustifolium*) is a
cheerful sight lining a sunny path.

Field Pussy-toes (*Antennaria neglecta* or *A. plantaginifolia*) is a grey-green ground cover with
adorable cat-paw flowers.

Prairie Dropseed (*Sporobolus heterolepsis*) is a small
ornamental grass with a soft look and a lovely scent.

mountain-mint — Mountain Mint (*Pycnanthemum muticum*) grows about 2 ½ feet tall,
has flowers that last for months, and smells wonderful.

Yet another prairie plant that looks great along a path is Prairie Smoke (Geum trilflorum). Its nodding pink flowers turn into puffs that give it another common name, Old Man’s Whiskers. The foliage stays fresh all summer and turns a lovely burgundy in the fall. It is not bothered by snow cover in the winter or hot dry summers.

Prairie Smoke in stages of spring bloom.

Another reliable low-growing groundcover that can fill in along a path mixed with shrubs and taller perennials is Barren Strawberry (Waldsteinia fragaroides). Blooming with bright yellow buttercup-type flowers for weeks from spring into summer, and semi-evergreen through the winter, it spreads slowly and is exceptionally hardy.

Barren Strawberry (*Waldsteinia fragaroides*) in March.

The most attractive pathway gardens include a variety of native perennials, grasses, and shrubs to create four seasons of interest.

A mixed border makes a path interesting.

There are a number of tough native shrubs that mix beautifully with perennials to create a real garden on the way to your front door:

Shrubby St. John’s Wort (*Hypericum frondosum*, or *H. prolificum*, or the pictured *H. kalmianum*)
are similar species, but different sizes, and all bloom with bright yellow pom-poms
adored by bumblebees.

Another great shrub for the entry path is Shrubby Cinquefoil (Potentilla fruticosa). Its flowers may be bright yellow or nearly white, its foliage a soft gray/green, and it blooms all summer long, much to the delight of native pollinators.

An entry path with Potentilla in full bloom.

So, there are many beautiful options for designing a durable planted path to welcome visitors (and nature!) to your front door. Think about pushing your lawn away from the path and giving a bit more space to a native garden that says: “walk this way!”

THIS BLOG IS WRITTEN BY CATHY LUDDEN, CONSERVATIONIST AND NATIVE PLANT EDUCATOR; AND BOARD MEMBER, GREENBURGH NATURE CENTER. FOLLOW CATHY ON INSTAGRAM FOR MORE PHOTOS AND GARDENING TIPS @CATHYLUDDEN.

Share this post:

TO SUBSCRIBE TO THE BLOG – AND NOTHING ELSE – ENTER YOUR EMAIL BELOW

May 30, 2024January 7, 2025 Cathy Ludden Around the Grounds, Native Plants

Blue Skies, Blue Eyes

Good morning, sunshine!

When the sun rises high enough to warm Blue-eyed Grass (Sisyrinchium angustifolium), its violet-blue flowers open wide to soak up the rays. A passing rain shower or dark clouds, however, will cause this sun-worshipper to fold up tight and hide until the sun reappears. From early May through June, and occasionally even later, the flowers of Blue-eyed Grass welcome the sun like kids on spring break.

Blue-eyed Grass basking in the sunshine.

Flowers curled up tight waiting for the sun after a rain.

Despite its common name, Blue-eyed Grass is not a grass at all. It’s actually in the iris family. The leaves are blade-shaped, like miniaturized versions of the leaves of bearded iris. And the flowers emerge from slits in the sides of the leaves, as they do in other irises.

The plant is only 6 to 12 inches tall, and the flowers are less than an inch across with cheery yellow centers. The small flowers can create a big effect if they are grouped along a walkway or at the front of a garden. They are a great choice for rock gardens, and for lining the edge of a paved path where the soil tends to be thin, poor, and rocky. Blue-eyed grass actually prefers poor soil and will suffer in rich, organic soil. Regular moisture is ideal as long as the soil is well drained — so a path to the front door is the perfect spot!

Blue-eyed Grass along a front entry walk.

Blue-eyed Grass is native to most of Eastern North America, from Newfoundland to Minnesota and south to Texas and Florida. Its typical habitat is damp meadows or grassy riverside areas where there is moisture, but sandy or rocky soil that prevents water from settling around the growing crown or roots. Most growers advise against mulching around the plant’s crown to prevent rotting. As long as you avoid that, the plant is virtually care free.

Blue-eyed Grass continues looking good even after the bloom season ends. The grassy clumps blend well with other small perennials or ground covers and stay fresh through fall. Hardy in zones 3 to 9, the foliage is semi-evergreen except in the coldest zones, and it is does not seem to mind being buried by snow shoveled off of walkways.

The grass-like texture of Sisyrinchium looks great all year.

Blue-eyed Grass is increasingly popular with suburban gardeners, so it is fairly easy to find at nurseries. A cultivar called ‘Lucerne’ was developed in Switzerland by horticulturists working with the North American native plant. Its flowers are bit bigger and darker blue than the straight species (all of the photos above are of ‘Lucerne’). Blue-eyed Grass is not attractive to deer or other mammals, but it does attract pollinators, so it’s a great addition to pollinator gardens. And the seed pods are favored by cardinals, house finches, and other songbirds late in the season.

Individual plants of Blue-eyed Grass are not long-lived, but they do seed themselves near the mother plant, so colonies can continue indefinitely. If re-seeding is not desired, dead-heading the flowers after blooming will prevent that. In fact, the whole plant can be sheared in mid summer to keep it tidy after blooming. Blue-eyed Grass grows from a small rhizome, but will also spread itself by sending out off-sets from the roots of the parent plant. If older plants seem to bloom less than before, they can be divided by digging up the plant and carefully teasing apart the roots to create new plants as well as refreshing the old one.

Though Blue-eyed Grass can be grown fairly easily from seed, it will take a few years to bloom. Container specimens can be planted in spring or early fall to give the roots time to develop. Gallon-sized or larger container plants will put on a good show their first season.

*Sisyrinchium angustifolium* straight species in the Meadow at the Greenburgh Nature Center.
Photo: Travis Brady

It’s a bit surprising that we don’t see this wonderful native plant more often in suburban yards. Instead of planting annuals that must be replaced every year, why not choose this native perennial for your front walk or along the edge of your patio?

If you do, blue skies will have Blue-eyed Grass shining for you!