Summer Garden of Bold Colors
By Niki Hayden
Spring may herald the pastels of traditional English gardens but summer is
all-American: neon yellow daisies, sherbet orange lilies, satiny magenta
hollyhocks, and robust sunflowers. Summer is a time of bold and hot colors.
Garden books often describe sunflowers and daisies as coarse--with stringy
stems and overblown blossoms. Pay no attention. You will be rewarded with
exuberant cheerfulness: black-eyed Susans, cosmos, coreopsis, gaillardia,
tithonia and marigolds. Artichokes, too, nestle among the sunflowers as close
cousins. Both are members of the sunflower family, where thistles are
related to chicory.
There’s nothing shy or shrinking about mid-summer cottage gardens. Within a
month, flowerbeds change their clothes from demure to dramatic, serene to
whimsical. Many require water, but they will take heat. A few,
like sunflowers, North American originals, will sink roots deeply into their
native soil and flourish.
North America doesn’t have the distinction of South America when it comes
to originating major food crops. Our soils did not produce tomatoes or potatoes,
but we can brag about a few remarkable foods. Pecans, blueberries, wild rice
(which is a seed rather than a grain), Concord grapes, cranberries, sunchokes
(also known as Jerusalem artichokes) and sunflowers originated on this continent
and were ferried across the Atlantic a hundred or more years ago. Since then, many
have transplanted. Sunflowers, as the showiest, are beloved everywhere.
In Europe, sunflowers made a splash, with their dramatically large seed
heads and vibrant yellow petals. Vincent Van Gogh painted sunflowers in his most
identifiable icons. These magical flowers follow the sun in a response called
heliotropism. Such a striking botanical property drew the attention of ancient
Aztecs in Mexico, where the flower appeared to mimic a sun worshipper and was
considered an omen of faith.
In contemporary gardens, common sunflowers have made way for new decorative
varieties—some dwarf, others multi-branching, mid-sized, with red, orange or
ivory petals. But whatever color or size, sunflower cultivation is the same.
Most are easy to grow and will find their way into the annual, perennial or herb
garden.
Drought-resistant sunflowers yield a particularly good crop on the Great
Plains. Farmers now must contend with a drop in the water table, which makes irrigation
less available. Some sunflowers will sink roots six feet into the earth. So
farmers
water their soil, allow the seeds to emerge, and then water only once again. The
rest of the water is saved for corn or wheat.
It’s also a low-maintenance crop. Sunflower seeds are sown on top of the
wheat stubble. There’s little need for fertilizer and sunflowers won’t
require the intense pollination by bees that other crops, like apples or
almonds, demand.
Along with millet, sunflowers are a typical rotation crop for wheat and corn.
On the world market, they add to the birdseed, snack food and sunflower oil
production each year. Thousands of acres in North Dakota, South Dakota, Colorado
and Kansas are devoted to this beautiful crop.
Although sunflowers are grown as food, they don’t appreciate the high
nitrogen levels often found in vegetable gardens. Plant them in a sunny location
among annuals, perennials or herbs but give them room.
Most will sprout directly seeded into the garden. If you have saved sunflower
seeds and question how viable they may be, here is a test for germination. Place
them in a dampened but not wet paper towel. Put the towel in a plastic bag and
wait a day or two for germination. The seeds that germinate first will be the
strongest. Should you have a fistful of leftover or questionable annual flower
seeds, you’ll know which should be planted in your garden. Sow directly in the
ground after any danger of frost.
Plant the germinated seeds one to two inches deep in the garden, but no
deeper than three inches. Most like regular watering about 20 days before they
bloom, but won’t need a lot of water otherwise. They should receive at least
six hours of full sun a day. Sunflowers need some space, about 12 inches apart,
even for the dwarf varieties. Very large sunflowers should be sprinkled
throughout the garden.
All sunflowers are annuals, propagating by seed only. Trial plantings in
Nebraska suggest that many pest cycles can be broken if seeds are planted after
June 5. The bugs simply have moved on. But you may not have any pest problems at
all. Although the Midwestern prairie is home to most of the 50 species of native
North American sunflowers, only a few insects, like the sunflower head moth,
attack them.
Various diseases like rust can be avoided by choosing rust resistant strains.
The seed package will tell if the strain you’ve chosen is resistant. As
always, the best way to avoid diseases is to rotate plants each year, both
vegetables and annual flowers, so that diseases don’t become entrenched in the
soil.
On farms, sunflower seeds with over 40 percent oil are set aside for oil
production. Seeds with a lower percentage of oil are saved for snacks and
birdseed. Your sunflower patch provides an excellent wildlife habitat for birds
and squirrels. But if you’d like to harvest the seed heads, cover the flower
with cheesecloth or a sheer plastic netting as the seeds are forming. Cut the
flower with about a foot of stalk in September or October and store it in a dry,
dark room. You can place a paper bag over the seed head to catch the seeds as
they fall.
Plants for a hot and bold summer garden: these plants offer red, orange or
yellow blooms in the height of summer
Perennials:
Butterfly Weed, (Asclepias tuberosa), a native milkweed, requires good
drainage, not too much water, bright orange flowers that does attract
butterflies
Hollyhocks (Alcea rosea), biennial, cottage garden standby, may not
bloom the first year and is a short-lived perennial.
Coreopsis (Coreopsis x grandiflora) There are varieties both perennial
and annual. A tough member of the sunflower family.
Daylily (Hemerocallis fulva is the common orange daylily), tough plant
that adapts to partial shade, few problems with pests or disease. The lemon
daylily (H. lilioasphodelus) is especially lovely.
Bee balm (Monarda), large bushy plant takes some space, but the informal,
moppet flowers are beloved by butterflies and hummingbirds
Rose of Sharon (Hibiscus syriacus), hardy shrub with long-lasting blooms, can
take some drought when establish, prune to shape
Coneflower (Echinacea purpurea), although purple coneflower is a Midwestern
prairie stalwart with high water needs, newer selections include orange and
yellow coneflowers. For a more drought-resistant coneflower, try the yellow and
burnt orange varieties of prairie coneflower (Ratibida columnifera)
Beard Tongue (Penstemon): ‘Firecracker’ (P. eatonii), ‘Scarlet
Bugler’ (P. centranthifolius), ‘Prairie Fire’ (P. barbatus), all
require excellent drainage, will endure drought once established
Yarrow (Achillea), hardy perennial with numerous varieties, will
endure drought once established
Red pincushion flower (Knautia macedonica) short-lived perennial
Red-hot poker (Kniphofia uvaria), hummingbird attractant, propagate with root
divisions
California fuchsia (Zauschneria epilobium), bright red flowers attract
hummingbirds
Annuals:
Sunflower (Helianthus annuus) is the common sunflower but others are
perennial and many come in reds and oranges, dwarf or multibranching.
Nasturtiums (Tropaeolum majus) edible flower from the cress family,
and have a similar taste to watercress. Easy-to-grow with exquisite wide lily
pad like leaves. Both climbing and trailing will cover rocks or trail along a
garden path.
Gaillardia (Gaillardia x grandiflora) Native to the United States,
and found widespread, easy to grow from seed, and will self-seed.
Celosia (Celosia cristata) Vivid crimson, orange, gold or pink plumes
that require little water once established.
Gazania (Gazania), striking markings in yellow and orange, easy to
grow from seed in any soil, very tender to cold
Tithonia (Titonia rotundifolia), also called the Mexican sunflower.
Can be drought-tolerant. Bright red flowers and up to six feet in height.
Portulaca or moss rose (Portulaca grandiflora), good for rock gardens,
containers and gravel beds, self-seeding.
California poppy (Eschscholzia californica) Native to California, best
naturalized in a meadow or among other native plants. Sow directly in the soil
rather than attempt to transplant. Keep soil moist until the seedlings emerge.
Once established, can withstand some drought.
Goldenrod (Solidago) a plume of yellow flowers that looks best in a natural
garden, naturalizes beautifully with daylilies.
Calendula (Calendula officinalis) Edible, very old-fashioned cottage
garden substitute for saffron. The color is similar, but not the taste.
Black-eyed Susan or gloriosa daisy (Rudbeckia hirta) derived from prairie
native plants from prairies.
Marigolds (Tagetes) Several varieties from tiny to several feet in height.
Easy to grow and pest free.
Cosmos (Cosmos bipannatus) a tough self-seeding annual, ‘Chocolate
Cosmos’ (C. atrosanguineus) is a tender bulb-like root that must dug up
before frost and stored as if it is a dahlia. Bright yellow (C. sulphureus)
Most are easy to grow from seed.
Zinnia (Zinnia elegans) Predictable annual that loves heat, but does
need water. Easy to grow from seed. They will sap energy from a vegetable
garden, so keep them on the periphery, or give veggies a wide berth with them. A
drought-tolerant perennial version is Zinnia grandiflora. These tiny
yellow flowers with bright orange centers will rot in moist soil. They emerge
late in spring, so have patience.
Vines:
Thunbergia, (Thunbergia alata),also called the black-eyed Susan vine
looks showy in hanging baskets.
Bulbs:
Dahlia (Dahlia): tender bulbs that must be dug for winter in most
places. Dahlias are native to Mexico. Decide if you have time to dig and store
the roots properly. Otherwise, treat them as annuals.
Lily: (Lilium) So many new lilies in garden centers now allow a wide
variety of Asiatic, Oriental and Aurellian hybrids. They’ll look stunning with
other bulbs, like alliums, too. They need moisture, cool soil and mulch.
Foxtail Lily (Eremurus): The roots of this octopus-like lily bulb will
remind you of asparagus roots (also in the lily family). Foxtail lilies need
some room, but they are extravagant, tall spires that companion exquisitely with
peonies.
Edibles:
Jerusalem Artichoke, also known as sunchoke (Helianthus tuberosus),
perennial grown for its tubers, which have sustained people during times of
famine. Can become invasive and needs a great deal of space. Very showy and
dominant. Excellent screen.
Amaranth (Amaranthus): As an edible, it’s grown for seeds, which
have been harvested by Native Americans as a nutritious food. Now it’s mostly
grown for the bright colors of dripping blooms. Dramatic in every way. Should be
direct seeded in warm temperatures above 70 degrees.