Crazy for Cosmos – Floret Flowers


Of all the annual flowering plants you can grow in your cutting garden (or even the back of your veggie patch), none are more productive than cosmos. They truly are a cut-and-come-again flower: the more you harvest them, the more they bloom.

A single planting will produce buckets and buckets of airy, delicate, daisy-like blossoms for many months. You can arrange them on their own or weave them into mixed bouquets.

The possibilities are endless.

Cosmos are incredibly easy to grow, making them perfect for beginning gardeners. Seeds can be started indoors to get a jumpstart on the season or sown directly into garden beds once the weather warms.

Either way, cosmos will bloom in just under three months from the date you sow them.

closeup of cosmos at Floret Flower FarmTo start indoors, sow seeds 4 to 5 weeks before the last spring frost, and then plant seedlings into the garden once all danger of frost has passed. Be careful not to sow seed too early, because seedlings will quickly outgrow their pots before the weather has warmed enough to put them out into the garden.

Alternately, you can sow seeds directly in your garden once the danger of all frost has passed. In about a week, you’ll see seedlings sprout up from the soil. Keep the young plants protected from slugs and snails as they are getting established since new growth is quite tender.

Harvesting cosmos at Floret Flower FarmPlants get very bushy and prefer a little extra room to spread out, so space plants 12 to 18 inches apart. Once in the ground, cosmos will grow rapidly, so be sure to stake them early, while they are still young. Cosmos also benefit from a technique called pinching, as this will encourage the already highly productive plants to branch even more vigorously.

Here’s how it’s done: When plants are young, between 8 to 12 inches tall, take sharp pruners and snip the top 3 to 4 inches off of the plant, just above a set of leaves. This signals the plant to send up multiple stems from below where the cut was made, resulting in more abundant flower production as well as longer stem length.

I typically do two sowings of cosmos, a month apart, and include some of my favorites listed here. This gives me a wide range of flower types and loads of blooms for cutting from summer into fall.

Harvesting cosmos at Floret Flower FarmThe Double Click series is available as a mix or in single colors. These unique double-flowered cosmos are loaded with fluffy blooms that look great in bouquets.

The Double Click Mix (pictured above) includes snow white, vibrant cranberry, rosy mauve, and a lovely soft blush.

Individual colors are also available and I am particularly fond of BiColor Rose, Cranberries and Snow Puff.

White cosmos at Floret Flower FarmNothing says country charm like pure white cosmos. Two of my favorite white varieties are:

Purity (pictured left) is a cheerful daisy-like bloomer that has perfect, pure white single flowers and produces an abundance of wildflower-like blooms.

The large, pure white blooms of Psyche White (pictured right) are a mixture of single and semi double flowers with a central ring of fluffy miniature petals. The ruffled flowers look like snowflakes dancing in the breeze.

Cupcake blush cosmos at Floret Flower FarmThese recent introductions to the cosmos family remind me of the Sugarplum Fairy:

The pale blush petals of Cupcake Blush are fused together forming a teacup shaped flower. Blooms are as big as the palm of your hand and the edges look like they have been cut with pinking shears. This romantic variety is a mix of single, semi double, streaked and solid flowers. Perfect for wedding work, this variety is a must grow!

Cupcake White is a pure white version of its blush sister. Flowers are as big as the palm of your hand and are extremely versatile for arranging.

Cosmos at Floret Flower FarmIf you’re drawn to rich, dramatic colors look no further than these stunning beauties:

This uncommon cosmos displays a vibrant range of colors. The large single blooms of Rubenza (pictured left) open with deep ruby petals and then fade into shades of muddy rose and terracotta as they age. There is nothing like it.

Velouette (pictured right) has fast become a new favorite on the farm and features deep mahogany flowers with delicate white striping. Tall and dramatic, this variety churns out armloads of long stems that are perfect for bouquets.

Armload of cosmos at FloretThese fun new novelty cosmos are the most unusual colors and while both are on the shorter side, what they lack in size, they make up for in exquisite coloring.

The delicate pale yellow flowers of Xanthos (pictured left) has green undertones. Its unique ruffled flowers have a subtle inner collar and pale throat, and blossoms have a dark yellow eye encircled by tiny fringed petals with pale serrated tips.

There is absolutely no cosmos like the beautiful Apricot Lemonade. The unique color reminds us of ‘Distant Drums’ roses – watercolored petals start out a soft apricot with a dusty lavender reverse and fade to a buttery yellow. Variations amongst the blooms include some flowers with a mauve ring at the throat. A bit of separation between the petals conjures a pinwheel with snipped dovetail edges. A must grow for event work.

Cosmos at Floret Flower Farm Striking in both the garden and the vase, these fun and eye-catching varieties are a must grow if you’re looking for something different.

The palest pink blooms and a dark rosy throat make Daydream (pictured left) an eye-catching addition to the landscape. A sweet treasure for the cutting garden or flower border. This variety has proven to be the most heat tolerant cosmos we’ve grown.

These early to flower gems are a new favorite on the farm. Shades of magenta, purple and raspberry have an iridescent quality and age to an apricot cast. Blooms on Xsenia (pictured right) are more petite than other cosmos varieties, and medium sized, healthy plants carry flowers on strong, upright stems. So many colors give the flowers a chameleon-like quality, and they mix well with a wide range of colors.

Cosmos at Floret Flower Farm Last, but not least. Two beautiful and hardworking pink treasures are:

Seashells Mix (pictured left): This delightful mix is filled with large, showy blooms that have fluted, tubular petals that resemble seashells. Flowers come in a sweet pastel mix of pink, rose, white, carmine, and other unique bicolors.

Rosetta (pictured right) is a new variety that’s a must-have for arranging and looks stunning arranged en masse. Blooms have a layer of half double petals that resemble fluffy petticoats. Rosetta is a mix of soft pink, blush and rose, with each petal appearing as if it was hand painted.

close up of cosmoTo prolong their flowering time, keep cosmos harvested regularly and deadhead any spent flowers before they set seed. The individual blooms of cosmos don’t last a particularly long time in the vase, about 4 to 6 days, but each stem is loaded with multiple blossoms that open individually over a period of a week.

Harvest when the buds are colored but haven’t opened up yet; this will keep insects from pollinating them and help stretch the vase life by a few additional days.

close up of cosmos flowersFor a small investment of time and garden space you will be able to fill your house with these cheerful flowers all summer long.

I would love to hear your experience with this wonderful group of plants. Do you grow cosmos or plan to add them to your garden this coming season? If so, what are your favorite varieties?

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