Which Cosmos are the best for a cut flower garden? (2024)

I believe it was the Greeks who first named the flower Cosmos. They saw the well-ordered petals around the center and considered it similar to how they believed the Cosmos to be. ‘Cosmos’ means ‘balanced universe’ in Greek.

I know what you’re thinking….”wow! Higgers….you’re so brainy!”….and you’d be right of course…but notjustbrainy…practical too. Our friend Cosmos is a super practical addition to any cutting garden. It’s easy to grow….has a long flowering period…keeps producing flowers after you cut them…and it lasts well in the vase.

Cosmos are right up there in the flowery hall of fame when it comes to the best flowers for your cutting patch. I am never ever ever without cosmos in my gardens. The first cosmos flower of the year is like meeting up with an old chum and splitting a bottle of posh wine in the sunshine. The issue I’ve had is how many varieties can I sensibly stock. Higgledy is a ‘micro business’ and we have to keep our total range under one hundred varieties and choose only the very best of the bunch (excuse the pun.) So I decided that I would stock the finest four Cosmos that exist on planet earth right now in the 21st century.

Cosmos ‘Purity’.

Which Cosmos are the best for a cut flower garden? (1)

“This popular annual cosmos makes a great filler for a sunny border, and as long as it’s dead-headed regularly, it will produce a succession of pure white, saucer-shaped flowers from early summer to mid-autumn. It’s very easy to grow and it makes an invaluable addition to the cutting garden.” RHS.

Cosmos ‘Purity’ was the first cosmos I grew back in the day. I had an incredible first harvest. We had flowers until November. I used to sell bunches of flowers in a local health food shop in Cambridge. Customers used to grab the bunches of flowers out of my hand before I could them to the manager. ‘Purity’ always helped to sell the bunches. You rarely see them in florists as I don’t think they travel well.

Cosmos ‘Fizzy Rose’.

Which Cosmos are the best for a cut flower garden? (2)

“A bushy, upright, half-hardy annual with finely-divided foliage and semi-double, white flowers stained and edged a dark pinkish-red, borne on stems to 1m tall, from summer into autumn.” RHS

I saw these growing in my chum, Mandy’s front garden. They are about as jazzy as I think a cosmos flower should go….I’m not a fan of cosmos with fluted petals for instance. I used to refer to ‘Fizzy Rose’ as ‘posh totty’s knickers’ but that was in the 1990’s and I need to refrain from that sort of language now. Fizzy Rose always sells well and my loyal customer base send me photos and tell me how much they love them…so Fizzy Rose is with us for the long haul.

Cosmos ‘Sensation’

Which Cosmos are the best for a cut flower garden? (3)

“Sensation Series are half-hardy annuals with fine, feathery foliage and, from summer into early autumn, single flowers, to 9cm in diameter, in shades of pink, red and white that are borne on stems to 1.2m tall” RHS

Not having Cosmos ‘Sensation’ in my seed shop would see me in the soup. The flower growing public would burn effigies of me and I would be sent to live on the Isle of Wight. Some say Sensation is a tad too flouncy for their tastes…and I get that….but it is certainly not too flouncy for mine. I have no problem with pinks and the bees seem to love Sensation too.

Which Cosmos are the best for a cut flower garden? (4)

I haven’t grown Cosmos ‘Apricotta’ yet but Higgledy Anne says she will leave Higgledy and go and work for Mr Fotherchops if I don’t start stocking it. I think you’ll agree she is a very beautiful and charming Cosmos….’Apricotta’ that is, not Anne….Anne isn’t a Cosmos….although she is beautiful and charming.

Tips for growing cosmos from seed:

*Either direct sow your Cosmos seeds direct into the soil after threats of frost have disappeared….or sow six weeks earlier in pots…in a greenhouse or on your windowsill. Best just not be in too much of a rush to get them started…one bit of frost and our Cosmos chums will keel over…and you will be all sad…guilty….and be in the shallows of despair….well…maybe. I sow mine from April (undercover)…outside after 10th May. I noticed that the wonderful flower farm ‘Organic Blooms’ sows in March…although they are in the southwest, which will account for early sowing to some degree.

*Prepare the bed you are going to grow them into…make sure it gets lots and lots of sun and is weed free.

*I thin my seedlings to a foot apart…many other flower folk sow two feet apart….either way your plants will need staking if the site is exposed.

*When you harvest cosmos flowers…cut them just above a leaf node and this way you will get some more blooms.

If I was thee, I would buy a packet of each from theHiggledy Seed Shop of Dreams.

If you have any questions you can find me onFacebook,Twitterand you will see heaps of photos of flowers, the boat garden and Flash onInstagram.

Kind regards

Higgers and Flash

Which Cosmos are the best for a cut flower garden? (2024)

FAQs

Which Cosmos are the best for a cut flower garden? ›

Both Cosmos bipinnatus and Cosmos sulphureus are good as cut flowers; pick them when the petals are starting to open (but are not fully open) and change the water every day.

What are the best cosmos for cutting? ›

Both Cosmos bipinnatus and Cosmos sulphureus are good as cut flowers; pick them when the petals are starting to open (but are not fully open) and change the water every day.

Can you use cosmos as cut flowers? ›

Cosmos are an excellent choice for cut flowers, offering an easy-to-grow, prolific source of beautiful blooms. With a little care and attention, you can enjoy a continuous supply of cosmos throughout the growing season, adding a whimsical and airy touch to your flower arrangements.

Do cosmos do well in a vase? ›

Cosmos have an excellent vase-life.

To ensure the cut blooms are long-lasting, pick them when the buds have color and look like they are about to pop. At this point, the flowers have not been pollinated or munched by a grasshopper and should last at least 5-7 days in fresh water mixed with floral food.

How long do cosmos last as a cut flower? ›

To 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 5 to 6 days, but each stem is loaded with multiple blossoms that open individually over a period of a week.

How do you keep cosmos in a vase? ›

The trick to getting the longest vase life of these is to harvest them at a swollen bud stage, where it's just about to open but hasn't yet. Once the cosmos have been pollinated, they don't offer much of a vase life. Their purpose in life has been complete.

Do cosmos come back every year? ›

are cosmos perennials? Most cosmos varieties are annuals, which means they won't return year after year. You can collect the seed and sow new cosmos each spring.

What is the difference between cosmos and marigolds? ›

Marigolds are known for their bright colors and strong odor and have long been associated with death and grief. They are a prominent fixture in Day of the Dead festivities, used to decorate gravesites and home altars. Cosmos is a symbol of order and balance, peace and innocence.

Do cosmos prefer sun or shade? ›

Light: Cosmos prefer full sun conditions, except in extreme heat where they can tolerate part shade. Soil: Prepare the garden with loose, weed-free soil. Cosmos prefer dry, arid soil over wet conditions.

What is the best time to plant cosmos? ›

Sow cosmos in early spring so the plants can become established before hot weather comes. Cosmos also can be started indoors in containers and set out when the seedlings have at least five leaves, or purchased as bedding plants. Plant seeds in prepared soil about 2 inches (5 cm) apart and one-half inch (1 cm) deep.

How to make cosmos bushy? ›

Water well and stand on a window sill or put into a frost-free greenhouse or cold frame. Once plants have 3-4 pairs of leaves, pinch out the growing tip of each stem. This seems scary but is the key to getting bushy plants that flower well. Simply squeeze the growing tip off between your finger and thumb.

Should I deadhead cosmos? ›

While you don't have to deadhead, doing so keeps the planty looking tidy and encourages a quick rebloom. Here's how to do it: Cosmos produces multiple flowering stems near the top of the plant. The center one opens first. As that one fades, clip it out and the side stems will take off more quickly.

What month do cosmos bloom? ›

In general, cosmos flowers will begin to bloom in early to mid-summer and continue blooming until the first frost of fall. How often should you water cosmos? As a general guideline, cosmos should be watered deeply once or twice a week, depending on the weather conditions.

Are marigolds good cut flowers? ›

Sure, marigolds make great bedding plants, but their bold blooms also enhance cut flower arrangements. Here are seven bright ways to display your favorite marigolds.

Is there a dwarf cosmos? ›

Love Cosmos but looking for a shorter variety? Sensation Late Blooming Dwarf Cosmos Seeds is the perfect choice, growing to be just 2-4' tall.

What are the best tall cosmos varieties? ›

Taller cosmos varieties, such as those in the 'Cosmos DoubleClick' or 'Cosmos Candy Stripe' series, are ideal for the back of a border, while shorter varieties like the 'Cosmos Sonata' series work well in pots or as a garden's front edging.

Which cosmos are perennials? ›

Most cosmos are annuals and will need to be resown from seed or planted as seedlings each year. Cosmos atrosanguineus, or chocolate cosmos, is the exception – it is a tender perennial. It's ideal for container gardens as the pots can be brought undercover over winter.

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