Germination01
7-10 days
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Seed Germination Kit
Cosmos Seed Starter Grow Kit
BOTANICAL NAMECosmos bipinnatus
USD 10.99
100 in stock
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)
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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
Start growing
Full sun. Too much fertilizer = leaves but no flowers.
Growing with your kit
Seeds In A Cup® seeds are large and easy for kids to handle.
Propagation
Seed.
Seasonal growth & harvest
Summer bloomer. Photoperiod sensitive (blooms late if planted too early).
Growing conditions
Scrub and waste areas.
Weather & tolerances
Drought tolerant; poor soil tolerant.
Pests & plant health
Aphids.
Plant safety
Safe.
Botanical features
Tall annual with feathery leaves and daisy-like flowers on long stems.
Varieties
‘Sensation’, ‘Seashells’.
Garden & everyday uses
Cut flowers, pollinator gardens
Native range & distribution
Native to Mexico.
Conservation
Secure.
Name origins
Greek ‘kosmos’ meaning order/harmony/beauty.
History
Missionary priests in Mexico cultivated them for their evenly spaced petals.
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.
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More ways to grow.
Matched using botanical names and explicit plant mentions in our catalog.
Entire Garden Kit
Thank You Bouquet Garden Kit
USD 24.99
100 in stock
Explore the growing details
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Mentions Cosmos in the catalog description
Growing details are supplied in the Seeds In A Cup® product catalog. Follow the instructions included with your specific kit.
Our information standards ↗The growing journal
Read. Learn. Grow.
8 articles matched to this plant.
cosmos · Growing guides
The Ultimate Guide to Growing Cosmos: A Masterclass in Cultivation
Whether you are establishing a backyard garden, a community plot, or an indoor sanctuary, mastering the cultivation of Cosmos requires a deep understanding of its biological prefer
Read articlecosmos · Plant health
Defending Cosmos: Integrated Pest Management, Pathology, and Soil Chemistry
The successful cultivation of Cosmos extends far beyond planting seeds and providing water; it requires proactive management of the surrounding ecosystem. As a highly sought-after
Read articlecosmos · Harvest & uses
Harvesting, Preserving, and Utilizing Cosmos: A Masterclass in Yield Optimization
Cultivating Cosmos is an investment of time and resources; the true reward lies in mastering the harvest. Knowing exactly when and how to harvest Cosmos dictates the quality of the
Read articleCosmos · Growing guides
How to Grow Cosmos: Complete Seed-to-Harvest Guide
A comprehensive, data-grounded guide to growing Cosmos, including seed starting, site planning, care, problems, harvest, safety, and FAQs.
Read articleCosmos · Growing guides
Cosmos From Seed: A Step-by-Step Garden Planning and Planting Blueprint
Learn how to plan, start, transplant, and care for Cosmos with a structured seed-to-garden workflow and clear answers to common questions.
Read articleCosmos · Plant health
Cosmos Problems Solved: Pests, Diseases, Yellow Leaves, and Seasonal Care
A practical troubleshooting guide for Cosmos covering diagnosis, pest and disease prevention, environmental stress, seasonal care, and FAQs.
Read article