A little seed. A new beginning.
Seeds In A Cup®A LITTLE SEED. A NEW BEGINNING.
Seed Germination Kit

Cosmos Seed Starter Grow Kit

BOTANICAL NAMECosmos bipinnatus

USD 10.99

Currently unavailable

Cosmos float airy, daisy-like blooms on tall feathery stems — one of the most effortless cut flowers and pollinator magnets.

GERMINATION7-10 days
SUNLIGHTFull Sun (6-8 hours daily)

Have a question about this kit?

Ask our team →
Explore the growing guide

Get to know your plant

A little knowledge.
A better beginning.

The growing details, all in one place.

Germination01

7-10 days

Light02

Full Sun (6-8 hours daily)

Temperature03

70-75F

Hardiness04

USDA Zones 3-10 (Outdoor); All Zones (Indoor)

THE PLANT NOTEBOOK

Cosmos care, from seed onward.

Botanical name
Cosmos bipinnatus
Common names
Garden Cosmos
Family
Asteraceae
Genus
Cosmos
Species
C. bipinnatus
01

Start growing

Full sun. Too much fertilizer = leaves but no flowers.

02

Growing with your kit

Seeds In A Cup® seeds are large and easy for kids to handle.

03

Propagation

Seed.

04

Seasonal growth & harvest

Summer bloomer. Photoperiod sensitive (blooms late if planted too early).

05

Growing conditions

Scrub and waste areas.

06

Weather & tolerances

Drought tolerant; poor soil tolerant.

07

Pests & plant health

Aphids.

08

Plant safety

Safe.

09

Botanical features

Tall annual with feathery leaves and daisy-like flowers on long stems.

10

Varieties

‘Sensation’, ‘Seashells’.

11

Garden & everyday uses

Cut flowers, pollinator gardens

12

Native range & distribution

Native to Mexico.

13

Conservation

Secure.

14

Name origins

Greek ‘kosmos’ meaning order/harmony/beauty.

15

History

Missionary priests in Mexico cultivated them for their evenly spaced petals.

A closer look

The details
behind your kit.

Full product description
Cosmos float airy, daisy-like blooms on tall feathery stems — one of the most effortless cut flowers and pollinator magnets. How to grow Cosmos from seed Sow your seeds at the depth listed on the included instruction card and cover lightly. Then set the clear humidity lid on top to hold warmth and moisture. Keep the planter warm and in bright light, and mist the surface whenever it begins to dry. When your Cosmos sprouts appear, remove the lid and move it to your brightest window or under a grow light. Once seedlings have their second set of true leaves, pot them up or move them outdoors after your last frost. Cosmos at a glance Botanical name: Cosmos bipinnatus Germination: 7-10 days at 70-75F USDA zones: USDA Zones 3-10 (Outdoor); All Zones (Indoor) Mature size: 36-72 inches Sunlight: Full Sun (6-8 hours daily) Seeds included: 10-20 seeds Frequently asked questions What's included in the Cosmos Seed Starter Grow Kit? How do I grow Cosmos from seed? Moisten the included soil, sow your Cosmos seeds at the depth on the instruction card, keep the planter warm and bright under the humidity lid, and mist until they sprout. Full steps are in your kit. How long do Cosmos seeds take to germinate? Cosmos seeds typically sprout in 7-10 days at 70-75F when kept warm and evenly moist. Your guide lists the ideal conditions. Does this kit use real potting soil? What if my seeds don't sprout?
Catalog variants
  • SIAC-TGK-456GHJJ — USD 10.99 · Out of stock
Shipping & returns

Explore our shipping information and returns information, or contact us with questions.

Good questions grow here

A little more clarity.

How do I grow Cosmos from seed?

Moisten the included soil, sow your Cosmos seeds at the depth on the instruction card, keep the planter warm and bright under the humidity lid, and mist until they sprout. Full steps are in your kit.

How long do Cosmos seeds take to germinate?

Cosmos seeds typically sprout in 7-10 days at 70-75F when kept warm and evenly moist. Your guide lists the ideal conditions.

INFORMATION SOURCE

Growing details are supplied in the Seeds In A Cup product catalog. Follow the instructions included with your specific kit.

Our information standards ↗

Keep your curiosity growing

There’s more to discover.

Explore all grow kits

The growing journal

Read. Learn. Grow.

1 articles matched to this plant.