Double Click Cranberries

Cosmos

Zone 4b Save Garden

Botanical illustration of Double Click Cranberries

🌱 70d to harvest Upright

Velvety petals unfurl in a crisp, layered bloom—pure, show-stopping color with a soft, satin sheen that seems to glow at the gard…

Crop Dates

Milestone	Date
Start Indoors	Apr 1st
Last Frost	May 13th
Transplant / Sow Outdoors	Jun 24th
Harvest Begins	Sep 2nd
Harvest Ends	Sep 27th

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	7

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Frequently Asked Questions

What pest or disease commonly affects Cosmos bipinnatus, and how can I stop it?

Cosmos bipinnatus (Asteraceae) is often bothered by aphids, which cluster on new growth and can leave plants sticky before they weaken. Spray affected tips with a strong jet of water, then apply insecticidal soap if you still see active colonies. If you notice powdery white patches (a common fungal issue in crowded, humid plantings), thin plants for airflow and avoid wetting the foliage when watering.

How often should I water Cosmos bipinnatus during the main growing phase?

During active growth, water deeply about 1–2 times per week, aiming to keep the soil evenly moist but not soggy. Let the top 1 inch of soil dry slightly between waterings, because cosmos performs poorly in persistently wet conditions. In full sun, newly established seedlings may need more frequent checks, but once established switch to deep, infrequent watering.

How do I tell when Cosmos bipinnatus is ready to harvest?

Cosmos bipinnatus flowers are ready when blooms are fully open with bright, well-formed petals and look fresh rather than droopy. For cut flowers, harvest in the morning, cutting stems just above a leaf node to encourage more branching. You can expect flowering around 70 days from sowing, and keep harvesting regularly to prolong bloom.

Velvety petals unfurl in a crisp, layered bloom—pure, show-stopping color with a soft, satin sheen that seems to glow at the garden’s edge. Double Click Cranberries forms dense, double cosmos flowers on sturdy stems, creating a lush texture that holds beautifully as a cut flower and makes beds and borders look richly finished. Expect dependable, long-lasting color from early summer through fall, with blooms that invite repeated admiration in every glance.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 7 days first.

Expert Note

For the best double blooms, sow shallowly, keep seedlings evenly moist, and transplant only after nights are consistently warm to avoid stunting.