Is it possible to have a perennial shade garden with continuous bloom throughout the summer and fall? By June, the trees are fully leafed out, sheltering our home from the summer sun’s strong rays. That means that the garden is in the shade, too. Will anything be blooming? You bet.
Some spring bloomers, like Heartleaf Foamflower (Tiarella cordifolia) and Virginia Goldenstar (Chrysogonum virginianum), also called Green and Gold, may continue their display into the summer months. While not yet blooming, the leaves of White Wood Aster (Eurybia divaricata) join the violets, ferns, and Spreading Sedge (Carex laxiculmis) to form a ground cover blanketing much of the garden. Arching four to five feet above them are long sprays of Goat’s-beard (Aruncus dioicus) a.k.a. Bride’s Feathers’ tiny white flowers, lighting up the deep shade. June brings Rosebay Rhododendron (Rhododendron maximum) and Wild Hydrangea (Hydrangea arborescens) blossoms, too.
Bottlebrush Buckeye (Aesculus parviflora) is part of the shrub layer in the woods behind our house. In July, this reliable bloomer with its large palmately compound leaves and tall spikes of white tubular flowers attracts Ruby-throated Hummingbirds in addition to Spicebush and Eastern Tiger Swallowtails.
Last summer we were surprised to see dark morph Tiger Swallowtails nectaring on the Bottlebrush Buckeye. By adopting this Pipevine Swallowtail-like coloration disguise, the Tiger Swallowtails gain some protection from being eaten by birds and other predators who have learned of the Pipevine Swallowtail’s toxicity. The dark morph occurs most frequently in areas where Pipevine Swallowtails are present. Maybe Dutchman’s Pipevine (Aristolochia macrophylla) and its namesake swallowtail are increasing in our area!
July is also the beginning of Purple Giant Hyssop’s (Agastache scrophulariifolia) long bloom, lasting well into September. We have it in both deep shade and a spot that gets a few hours of afternoon sun, blooming dependably in both locations. This herbaceous plant is a great choice for a woodland garden, with a growth form that is similar to Butterfly Bush. In our garden, butterflies from the smallest skippers to the largest swallowtails love Purple Giant Hyssop. Bees love it, too, and even hummingbirds may drink from the nectar-packed purple flowers.
Pollinators can’t resist Mountain Mints.
I decided to try Short-toothed Mountain Mint (Pycnanthemum muticum), also called Clustered Mountain Mint, the only one of the Mountain Mint (Pycnanthemum) species I thought could tolerate some shade. I put it in the one location that gets about four hours of afternoon sun, and I got lucky. While not as robust as it would be in a sunnier spot, it’s doing well, its tiny magenta and white blossoms enticing the smaller butterflies like azures and skippers throughout July and August.
As summer progresses, False Sunflower (Heliopsis helianthoides) radiates bright yellow sunbursts at the wood’s edge from July well into September.
Eastern Tiger Swallowtails and Bumble Bees are frequent diners at Great Blue Lobelia (Lobelia siphilitica), open for business during August and September. Even Ruby-throated Hummingbirds will stop here for a drink.
Also in August, after gathering energy from the sun from the earliest spring days when its leaves begin to emerge, White Wood Aster blinks on its light show of white blossoms, illuminating the dense shade through October. The delicate blue disk flowers of Carolina Elephantsfoot (Elephantopus carolinianus) provide a complementary offset in August and September.
Butterfly traffic slows by September, but Black Swallowtails may still lay eggs this late, sometimes on my cooking herbs (parsley and dill).
Last fall we hosted a chrysalis on a hot pepper plant.
More aster family members begin their fall performance now, including Blue Wood Aster (Symphyotrichum cordifolium),
Wreath Goldenrod (Solidago caesia),
and Zigzag Goldenrod (Solidago flexicaulis), in bloom and offering nectar through October or early November. Like White Wood Aster, all of the foliage of these species emerged in early spring from the winter’s leaf cover.
All of these summer and fall blooming species have a reproductive strategy that includes clusters or spikes of flowers that bloom gradually over a period of many weeks, increasing each plant’s chances of pollination by bees, butterflies, and others, and resulting in a long colorful garden display.When successfully pollinated, Purple Giant Hyssop, Carolina Elephantsfoot and Woodland Sunflower offer Chickadees, Goldfinches and other birds a fall bounty of food.
Resident and migrant birds dine on the bright red fruit of Spicebush (Lindera benzoin) and Flowering Dogwood (Cornus florida) and the dark blue fruit of Sassafras (Sassafras albidum) and Blackhaw Viburnum (Viburnum prunifolium). This is after a busy season of acting as caterpillar food plants – Spicebush and Sassafras for Spicebush Swallowtails, Flowering Dogwood and Blackhaw for Spring Azures.
In October and November, Witch-hazel’s (Hamamelis virginiana) spidery yellow blossoms complement the fall foliage.
The bright red fruits of Winterberry Holly (Ilex verticillata) may last until late winter, when hungry birds finally eat them.
Little maintenance is required in this woodland garden. Because the plants have filled in to form a ground cover in most places, there is little weeding to do. We primarily use naturally fallen leaves as mulch, although we may supplement with a bit of prepared leaf compost around the front edges, in deference to our homeowners’ association’s sensibilities.
When we were trying to grow lawn in the shade, it was sparse, and we had problems with standing water after a heavy rainfall. Not anymore. The trees, shrubs and other plants in the garden, as well as the leaf litter, help the soil to absorb rainfall. The shade keeps the soil from drying out too quickly. So once these plants are established, watering is only required when drought conditions become extreme.
Not a bad performance for a woodland garden. And it brings so much pleasure!
This is part 3 of a 3 part series. To see parts 1 & 2, see A Butterfly Garden That Embraces the Shade and A Butterfly Garden That Embraces the Shade – Spring.
This post was adapted from an article that was originally published in the Summer 2013 issue of Butterfly Gardener, a publication of the North American Butterfly Association.
I loved your series of three artiles about shade gardening, as that’s about half my property. I was wondering, though, if the garden you discuss in part 3 is the same shade garden featured in parts 1 nad 2. I love seeng the picture of the entire garden and the arrangement of plant. Do you have a photo of the garden featured in part 3. I may just have to copy your garden design!
Hi Carol, It is all the same garden! The Witch-hazel, Flowering Dogwood, Winterberry Holly, Spicebush and Bottlebrush Buckeye are all part of the shrub/understory layer. There’s an area that gets about 4 hours of afternoon sun, and that’s where I put the Short-toothed Mountain Mint. The Purple Giant Hyssop and Great Blue Lobelia have disappeared, but the asters and goldenrods are all doing really well, and have spread to create a wonderful carpet of plants, resulting in very little weeding.
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“Not a bad performance for a woodland garden.” You’re the master of understatement, Mary Ann!
Your garden and its biodiversity are marvelous, beautiful, providing sustenance to any bird or bee, butterfly or other pollinator fortunate enough to find its way there. If only everyone gardened as you do.
Gardening with plants native to your area is so rewarding!
An impressive share! I’ve just forwarded this onto a coworker who has been conducting a little research on this.
And he actually ordered me lunch simply because I stumbled upon it
for him… lol. So let me reword this…. Thank YOU for the
meal!! But yeah, thanx for spending time to talk about this topic here on your web page.
A little prairie near my condo in the Chicago suburbs affords me so much pleasure! Last fall I collected a milkweed pod and today I came upon it and was marveling again at the softness of the silk and how it is looped. I googled to discover how much silk birds use in their nests and your site topped the results.
Your photos are breathtaking and your text lively and rewarding. This winter has been the third coldest and snowiest here in monochrome white Chiberia where by now any temperature above freezing feels summery and 40 is the new 80. We’re supposed to get there next week, but right now it’s snowing again. White is pretty, but your photos make me gasp at the tenderness, intelligence, busy strivings and remembered colors of wildlife. I truly appreciate your affection for nature and your artistry at capturing it. Thank you!
Thank you for your beautifully expressed and generous comment! I feel lucky to be able to capture and share just a little bit of nature’s beauty and wonder.
Sorry it took me so long to respond to you. We were cross-country skiing in the Adirondacks and Vermont for a few days. It’s the gateway activity that helped me to learn to enjoy winter. Have you visited your prairie lately? It may have some surprises in store for you.
ps Chicago is a great place!
It’s all lovely. Lots of hard work getting it this point, but I find my natives are very kind to me once established.
When plants are planted in sites where they are well adapted, they do great.
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Love it! Your photos are magnificent. I just want to add that my purple coneflower is STILL blooming, and my spiderworts kept busy into October.
Wow! A pretty impressive performance from those gorgeous plants. Thanks, Emily!
Guess I need to print this and head go shopping!
You can get some good bargains this time of year, and fall is a good time for planting!
Another FABULOUS entry, Mary Anne. Thanks a million!
Thanks, Nancy! I’m glad you liked it.