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Why ‘September is the new May’ when it comes to planting flowers

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Your garden may not be looking Instagram ready at the moment, but do not give up: There is time for more color before the first frost. (Photos: Envato Elements)
On the cusp of fall, the direction that a flower garden is headed may not be the stuff of viral social media images. And it may not inspire a weary gardener’s delight.اضافة اعلان

But do not stop now. As Jenny Rose Carey, a longtime flower gardener and vocal believer in the possibilities of the weeks ahead, puts it, “September is the new May”.

Of course, in the garden, May is a moment neither short on color nor marred by what she calls “the crispy bits”. (First action item: Tease those out with your snips and push ahead.) But Carey offers some encouraging words. Think fresh, she advises us, and think vivid — even as autumn comes on, and right through to frost.

Carey, a popular lecturer and author, is former senior director of the Pennsylvania Horticultural Society’s Meadowbrook Farm, a public garden in a historic estate setting. So it is no surprise that her recipe for a design with staying power relies on strategic plant choices.


(Photo: Chanticleer, Taken by Lisa Roper)

It also involves something that gardeners too often skip: proactive maintenance tactics that help coax the maximum output from flowering plants — even annuals planted months ago. At her garden in Pennsylvania, the nasturtiums are still at it, welcoming fall as enthusiastically as they do at Giverny — painter Claude Monet’s garden in France — where they lead visitors down the literal garden path into the next season. You just have to know the trick.

As the heat begins to wane, Carey, who taught horticulture at Temple University for years, is in back-to-school mode. That means taking field trips, visiting gardens in search of ideas, especially during the seasons that often stump us. She has taken inspiration from public gardens such as Wave Hill in New York City, where fall has long been a celebrated season, and Chanticleer Garden in Wayne, Pennsylvania, where last month and this month are still prime time, too.

How do you keep your garden going strong until the frosty end? Start by looking at landscapes like those for clues.

Flower shape and scale (and color, too)
The title of Carey’s new book makes her approach clear: “The Ultimate Flower Gardener’s Guide: How to Combine Shape, Color, and Texture to Create the Garden of Your Dreams.”

Color is just one element of her strategy — and it is not even the first thing on her list. Although it may be what many gardeners focus on when they’re plant shopping, a color palette alone will not ensure cohesion in the garden.



And strong color elicits strong opinions: Hot-colored gardens have their detractors as well as their adherents, and so do pastel ones.

“But in general, everyone agrees that a garden that looks really pretty, nice, joyful,” Carey said, “has a variety of shapes of flowers, textures of leaves, and heights.”

She advises us to look more closely at form in the garden — including the forms of flowers. How often do we gardeners consciously consider that?

The pollinators do. A diversity of insects responds to a range of shapes. Each species’ evolution alongside particular native plants has engineered intimate relationships; flowers are not one-size-fits-all.

Think about the forms that inflorescences take: As summer winds down, Patrinia (Patrinia scabiosifolia) and the taller sedums are still going strong with their flat-topped blooms. Spherical choices include globe amaranth (Gomphrena globosa) and rattlesnake master (Eryngium yuccifolium). Great blue lobelia (L. siphilitica) offers up vertical spikes, as does obedient plant (Physostegia virginiana).



Other options include the later-blooming varieties of the surprise lilies (Lycoris), with their trumpets, and lots of flowers shaped like daisies.

Play with scale, too. “Some of the asters are very cute, little, tiny daisies, and then you get the bigger, bolder ones,” Carey said. “Get your eye in a little bit more and be a little more critical of your compositions.”

Make the most of flowers with subtle differences, such as Rudbeckia Henry Eilers, with its quilled petals. Here’s where color can really help at a time when there is often too much yellow: Mix it up with the orange-and-yellow flowers of Rudbeckia hirta Irish Eyes, with their showy green centers, or the red-and-yellow petals of the annual blanket flower (Gaillardia pulchella).

Annuals that can go the distance, with care
The first plants we may think of to bolster the garden’s late show are classic fall perennial combinations, such as asters and goldenrods.



Two goldenrods that behave better and spread more slowly than others in mixed plantings, Carey said, are Solidago rugosa Fireworks and the compact cultivar S. sphacelata Golden Fleece. Also recommended: aromatic aster (Symphyotrichum oblongifolium Raydon’s Favorite) and white wood aster (Eurybia divaricata), which “makes a good mixer and mingler,” she said.

But Carey is equally fond of the annuals grown mostly from seed and planted in spring: Zinnias, spiky Celosia, flowering tobacco (Nicotiana), and orange Cosmos sulphureus, with its bonus of ferny-textured foliage. All are still going strong in late summer, thanks to the regular trimming of stems that held spent blooms. So are cleome, Gomphrena, and various salvias, with their tubular flowers that invite hummingbirds to make a pit stop on the way south.

Do not forget the Dahlias
Carey’s garden, called Northview, is cottagelike in style, befitting her 1887 Arts-and-Crafts home. Her flower-packed designs are not heavy on ornamental grasses or bold-foliage tropical plants such as elephant ears (Alocasia and Colocasia), bananas and cannas, two plant groups that extend the season until the first frost at Wave Hill and Chanticleer.



Dahlias are Carey’s “bold beauties,” her late-season mainstay. Their range of shapes is an object lesson in the mix-it-up advice she gives about flower forms. There are spiky cactus types and frilly anemones, some with a single row of petals like a daisy and others positively overstuffed.

She lets frost blacken and knock down the dahlias — “a very sad day in the garden” — and waits a week before cutting back the stems to about 15cm above ground and digging the tubers. The uprooted plants rest on crates for a few days, stem ends down, so excess moisture drains out. Then they are rolled up in newspaper and stashed in the cellar for winter.

The Finale: Chrysanthemums and colchicums
The last act of the season will be the perennial chrysanthemums, which will last until frost takes them. These are not those less-hardy, potted, garden-center mums of the moment in autumnal shades, but silvery-pink Emperor of China, pink-and-white Clara Curtis and Sheffield Pink. Their rosy tones provide a cooling foil to fall’s fiery colors.

These plants, too, get some tough love at Carey’s place. Pinching them back several times before midsummer reduces their eventual height and promotes more blooms, as the Chelsea chop does earlier, on other perennials.

There is another way that September is like May, Carey noted: It is a time when we are busy working, not just admiring. Those faded bits are trimmed back and then back again — although care should be taken to leave behind anything that birds (or people) may enjoy come winter.

Seed is saved; perennials are divided. Bulbs are bought and planted, including perhaps more autumn crocus (Colchicum), another of the flower garden’s last gasps.

Their robust foliage, which emerged in spring, disappeared as they went dormant in summer. Now what look like miniature waterlilies in lilac and white seem to appear suddenly, out of nowhere, enlivening the edges of some beds.

It’s one more hopeful effort in the race against the inevitable — almost convincing us that the procession will never end.


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