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UK Delivery 95p. Free On Orders Over £12.50

Cosmos Seeds - Carpet Formula Mix

Botanical - Cosmos sulphureus


Seed Count:
90 Seeds
Usually despatched within 24 hours
See "Delivery Charge" tab below
Price £1.75

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90 Seeds.

Other Names - Mexican Aster…

Cosmos Carpet Formula Mix produces an abundance of semi-double flowers in brightly coloured shades of orange, golden yellow and deep red. This variety is especially suitable for the front of the borders as it only grows to 25 - 30 cm tall.

  • Compact , well-branched plants.
  • The vibrant colours remains when dried.
  • Loved by bees and other beneficial pollinators.

Suitable For - Flowers for cutting, bedding plants, cottage gardens, containers, wildlife gardens, borders

Sowing Months - March - May

Flowering Months - June - October

Soil Preperation

To help with moisture retention and fertility add a good amount of well rotted manure or compost to the soil. If the soil is a heavy clay add some gritty sand to help with drainage. Remove weeds from the area.

General Information
Habit Annual Soil type Well drained, moisture retentive soil
Type Dwarf Variety Distance between plants 20 - 25 cm
Position Full sun Sowing depth 2 mm
Average height 30 cm Germination Temperature 18 to 25℃
Average spread 30 cm Days to germination 7 - 21 days
Hardiness Half hardy down to 0 RHS Bee friendly Yes
Soil Ph   RHS Award winner No

Sowing Guide

Early Sowing/Module Sowing

Sow cosmos seeds on the surface of moist compost in trays, pots or modules.
Cover with compost or vermiculite.
Place in a polythene bag and seal or place in a propagator. Germinate at a temperature suggested above.
When germination commences remove the container from the propagator or bag and place in a well lit area with a reduced temperature however protect from frost and protect from direct hot sun at this point.
Keep the compost damp however avoid overwatering.
When the seedlings are large enough to handle transplant into 7.5 cm pots.
Grow on in frost free conditions, a greenhouse or cold frame is ideal.
Plant out when the young plants are growing strong and all risk of frost has passed.
Harden off over 7 - 10 days before planting out.

Direct Sowing

Sow the seeds thinly, outdoors in April to May in a well prepared seed bed in rows 25 cm apart were the flowers are to grow. The soils should be a fine tilth.
Lightly cover the seeds with some fine soil and water well.
When the seedlings are large enough to handle thin to 20 - 25 cm apart.
The stronger thinning's can be replanted elsewhere in the garden.
Water thinning's well.

Growing On

Water the young cosmos well until established.
When they are 15 - 20 cm tall pinch out the growing tip. This will encourage stems to branch out and allow more flowers to grow.
Avoid over fertilizing as this can result in poor flower production.
Water established plants well in dry weather.


Dead-head regularly to encourage more flowers to grow.

Delivery Information

All products on this website are for delivery to the UK only.

(Including Northern Ireland, the Highlands & Islands, Scilly Isles, Channel Isles and the Isle of Man). Delivery charges to these areas are the same as UK mainland stated below (with no additional surcharge). Delivery however may take longer than the times stated due to weather, distance etc.)

FREE DELIVERY on all orders over £9.98

When applicable, free 2nd class delivery will be automatically calculated at checkout.

STANDARD DELIVERY - Royal Mail 2nd Class (3 - 5 working days) - £0.95

For orders under £9.98, the "Standard Delivery" charge will be added automatically at checkout.

FAST DELIVERY - Royal Mail 1st Class (1 - 2 working days) - £1.52

If preferred please select this delivery option at checkout.

For further information please visit our Delivery, Postage & Packaging page.

Returns & Refunds

We like to be transparent with our customers, here are your rights as a consumer -

The 14 day cooling off period.

Under the 'Consumer Contract Regulation Act' you the consumer have the right to cancel a long distance order (such as a website order) at any time from the moment the order is placed up until 14 calendar days from the day after the goods are received.

So if for whatever reason you change your mind within this time and wish to return the goods, simply send us a 'Cancelation Form' (full details can be found on our Your Right to Cancel page). On receiving the undamaged goods back from you we will fully reimburse you with all payments received including the cost of standard delivery. You will however need to bear the cost of returning the goods back to us.

For full details please visit our Your Right to Cancel page.

Damaged, Incorrect or Missing Goods.

We want you to be 100% delighted with your purchase.

If however you receive goods that have been damaged, incorrect or missing, let us know within 72 hours of receiving the goods and we will either fully refund you (including postage costs), promptly send you a replacement or credit your Groseeds account, depending on your preference.

For full details, including how to contact us, please visit our Returns & Refunds page.

Faulty Goods.

We guarantee to supply you with the finest quality seeds in prime condition.

All products sold by Groseeds come with a 365 Days 100% Satisfaction Guarantee (from the date of purchase). For further information please visit our 12 Month Guarantee page.

If however within the 12 months you find the goods to be faulty please contact us ASAP so that we can resolve the issue promptly. Full instructions, including how to contact us can be found on our Returns & Refunds page.

We want you to be 100% satisfied with your purchase. Any issues will be dealt with promptly, courteously and efficiently.