Cosmos bipinnatus ‘Dwarf Mix’ | The Petal Pop

Name: Cosmos bipinnatus ‘Dwarf Mix’ | The Petal Pop
Brand: Laura Florals
SKU: CDM007
Price: 23.99 GBP
Availability: OutOfStock

Cosmos bipinnatus dwarf mix plants with pink and white flowers growing on a balcony in a blue upcycled metal bucket container with an outdoor chair on either side of the planter.

£23.99

Purple · Crimson · Pink · White

Airy, daisy-like flowers dancing on fern-fine foliage all summer. No garden, no greenhouse, no clue required either — that's rather the point.

The Cosmos 'Dwarf Mix' grow kit is a plastic-free, beginner-friendly planting kit with (almost) everything you need to grow cosmos from seed in a container — compact plants smothered in bright, daisy-like blooms of purple, crimson, pink and white, above delicate, ferny leaves.

Being a dwarf type it stays neat and bushy — perfectly happy in a pot on a doorstep, balcony or sunny ledge — and it's a lovely cut flower: snip a jam-jar posy and the plant simply makes more, right into autumn.

Not one for the vase? A quick deadhead of the faded blooms does the same job.

Cosmos is also a magnet for bees and butterflies, so this little flower grow kit pulls its weight for pollinators.

New to growing? This is one of the easiest flowers to start from seed — fast, forgiving, and it genuinely prefers a bit of benign neglect to fussing. Poor-ish soil and the odd missed watering suit it fine; overfeed or overwater and you'll get lush leaves and few flowers. The more you cut or deadhead, the more it gives. A proper beginner gardener's win.

One honest heads-up: cosmos is half-hardy, which is a polite way of saying it's a softie about the cold. It hates frost and sulks in chilly soil, so up here in Scotland the rule is simple — don't rush it outside. Warmth first, flowers later.

What's in your kit

Cosmos 'Dwarf Mix' seeds
Seaweed meal — a gentle all-rounder to wake up your compost
Comfrey pellets — a natural potassium feed for more flowers, used sparingly once the buds appear
A plain-English grow guide, from sowing to the vase

What's not in your kit (on purpose)
No plastic planter, no bag of compost. You bring your own free-draining peat-free compost and an up-cycled container — anything with drainage holes. Less to post, less to bin, less to cost the earth.

Why choose this grow kit?

Airy, daisy-like flowers in four bright colours, all summer into autumn
Cut-and-come-again — the more you pick or deadhead, the more it blooms
A magnet for bees and butterflies
Thrives on a bit of neglect — beginner-friendly, dwarf, no staking, no fuss
Plastic-free seed kit — and posted plastic-free too
Every kit funds living wage jobs and horticultural training in Ayrshire

The bit that matters most

Laura Florals is a social enterprise, so every kit funds living wage jobs and horticultural training right here in Ayrshire, for people overcoming homelessness. So your cosmos does a bit more than look pretty.

Ships plastic-free to mainland Great Britain.

Gardening, minus the gatekeeping.

Have a grow, Laura x

FAQs

Is this cosmos grow kit suitable for beginners?
Yes — cosmos is one of the easiest flowers to grow from seed, and it actually prefers a bit of neglect to fussing. As a dwarf type it needs no staking, thrives in a pot, and flowers all summer with just the odd deadhead. No garden or experience needed.

Can I grow cosmos in a pot or container?
Yes — this compact dwarf cosmos (roughly 40–60cm) is well suited to pots. Use a container at least 30cm (12in) wide and deep, with drainage holes, and free-draining peat-free compost, in full sun (6+ hours a day). Two or three plants share a 30cm pot nicely.

What do I need to supply myself?
Just free-draining peat-free compost and a container at least 30cm (12in) wide and deep with drainage holes. The kit provides the seeds, a gentle seaweed feed, potassium-rich comfrey pellets and a plain-English grow guide.

Is the packaging plastic-free?
Yes — the kit is plastic-free, and we post it plastic-free too.

Where do you deliver?
We ship across mainland Great Britain. We can't post seeds or planting material to Northern Ireland — that's a Royal Mail restriction on sending seeds, not our choice.

Grow Guide

Cosmos is quick and easy-going — the two things to get right are warmth (it's frost-tender) and not spoiling it (rich, wet soil gives leaves, not flowers). Don't add manure or high nitrogen feed.

The indoor start (recommended up here in Scotland): sow March–May, on the surface of moist compost, barely covered with compost — just a light dusting over the top. Keep it warm and bright, around 20°C. Seedlings usually show in 7–21 days.

Pot on and pinch: once seedlings are about 5–7cm, move each into its own small pot. Then, when a young plant has two or three pairs of proper leaves, pinch out the very top growing tip — it feels brutal, but it makes the plant branch out bushier and gives you far more flowers.

Harden off and plant out: after all frost has passed (late May–June up north), acclimatise them to the outdoors gradually over a week or two, then settle two or three plants into a 30cm pot of free-draining compost, in your sunniest spot.

Or sow straight outdoors: from late May, once the soil's genuinely warm and frost is well behind you. In Scotland we run 2–3 weeks behind the season in the south of England, so don't rush it — a cold, wet start rots the seed. Thin to the strongest two or three plants per pot.

Cosmos is that rare plant that does better on a bit of benign neglect — the commonest way to get few flowers is to be too kind to it.

Watering: water when the top of the compost feels dry, at the base rather than over the leaves. Cosmos is fairly drought-tolerant once established and likes free-draining compost — it would far rather be a touch dry than sit wet. Don't drown it.

Feeding — sparingly, and only once buds appear. This is the key: too much feed (especially nitrogen) gives you a lush jungle of leaves and hardly any flowers. So there's nothing to add at planting. Once flower buds start to form, sprinkle the comfrey and seaweed from your kit over the compost's surface around the base of the plant, not touching it, and water in. The comfrey is potassium-rich — the "flowers" nutrient — which is exactly what tips the plant towards blooms rather than leaves. A light hand is the whole trick.

Cutting & deadheading — this is what keeps it flowering.

Cosmos blooms from summer right into the first frosts, and the golden rule is simple: the more you remove, the more you get. Whether you're cutting flowers for a vase or just snipping off the faded ones, you're telling the plant to make more — so a regularly-picked or deadheaded plant keeps going for months. Leave the spent flowers on and it sets seed and starts to wind down.

Not cutting for a vase? Just deadhead: snip each faded flower back to the next set of leaves before it sets seed. Same trick, same result.

Cutting for the table? Cosmos is a lovely, airy cut flower — cut long stems just as the buds are opening, and the plant branches and throws up even more.

And the real reward: the first bloom stops you in your tracks — a punch of colour you grew from a pinch of seed, dancing on the breeze. Cut an armful for a jam jar on the windowsill, and you've got summer on the table that you made happen. That's the whole point.

None of these mean you've failed — it's just a cosmos telling you something.

Lots of leaf, few flowers: the classic cosmos gripe — too much feed (especially nitrogen), too little sun, or both. Full sun is non-negotiable, and go easy on the feeding. Potassium (the comfrey), not nitrogen, is what you want.
Seeds rot instead of sprouting: sown too cold or too wet. Cosmos needs warmth — wait for it, and don't overwater before they're up.
Tall, floppy, pale seedlings: reaching for light. Give them your brightest spot, and remember to pinch the tips once they've a couple of pairs of leaves.
Plant flopping or sprawling: usually too little light, or too rich a soil making it leggy. A sunny spot and lean compost keep it sturdier; a few twiggy sticks tidy it in a windy corner.
Seedlings stripped overnight: slugs. A torch-lit patrol is your friend while plants are young.

Stuck on something not listed? Message us — that's genuinely what we're for.

New to this? Here's what's true for every kit we sell.

Compost — you supply your own peat-free compost. Any good bag will do. We don't include it (it's heavy, and you may already have some).

Container — almost anything with drainage holes works: an upcycled bucket, a trough, a big pot. No holes means waterlogged roots, so make some if there aren't any. We don't send a planter on purpose — growing in what you've already got is cheaper and greener.

Light — most things want a bright spot: a sunny windowsill, or outside once the weather's kind. Each guide tells you what that plant prefers.

Gardening, minus the gatekeeping. If a step ever reads like jargon, that's on us, not you.

Every Laura Florals kit is built around what your plant actually needs.

Your cosmos kit contains:

Cosmos 'Dwarf Mix' seeds
Comfrey pellets — a natural potassium feed for more flowers. Use sparingly, once flower buds appear.
Seaweed meal — a gentle all-rounder, alongside the comfrey
A plain-English grow guide

What you supply: free-draining peat-free compost, and a container at least 30cm (12in) wide with drainage holes — an upcycled tub or bucket is perfect.

Everything ships plastic-free. We can only post seeds and planting material to mainland Great Britain — sorry, Northern Ireland, that's a Royal Mail rule, not ours.

We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.

Our goal is for every customer to be totally satisfied with their purchase. If this isn't the case, let us know and we'll do our best to work with you to make it right.