SproutSmart
SproutSmart™ Intelligent Garden Sowing

Double Click

Family: Asteraceae Annual flowering plant
Zone 6b Save Garden

Planting Schedule

Add Double Click to your garden to build a schedule and get reminders.

Velvety, petal-bright blooms open like confetti against airy green—Double Click delivers a lush, fully double cosmos that feels almost plush at first glance.

Expect rich color with a dense, layered rosette of petals and a graceful, upright habit that holds its charm from bud to bloom, making it a standout in bouquets and garden beds alike. Grow it for long-lasting showy flowers that sway with the breeze and invite repeated admiration all season long.

Light: Full SunMaturity: 70 DaysHabit: Upright

Botanical illustration of Double Click

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

MilestoneDate
Start IndoorsMar 28th
Last FrostApr 25th
Transplant / Sow OutdoorsApr 25th
Harvest BeginsJul 4th
Harvest EndsOct 16th

Crop Details

TraitValue
Days to Maturity70
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthSurface
Germination Temp (°F)70
Min Soil Temp (°F)55
Min Night Temp (°F)45
Harden Off (days)7

Frequently Asked Questions

What pest or disease commonly affects Cosmos bipinnatus (double click cosmos), and how can I control it?
A frequent problem is powdery mildew, which shows up as a white, dusty coating on leaves during warm, humid spells. Improve airflow by spacing plants (or thinning seedlings) and water the soil rather than the foliage; remove heavily infected leaves to slow spread. If mildew is recurring, use a labeled sulfur or potassium bicarbonate spray per the product directions, starting as soon as you see the first patches.
How often should I water Cosmos bipinnatus during the main growing phase?
During active growth and bud formation, keep the soil evenly moist but not soggy—water when the top 1–2 inches of soil feel dry. Cosmos bipinnatus is fairly drought-tolerant once established, so avoid frequent light watering that keeps the surface wet; deep watering encourages stronger roots. After plants start blooming well, you can slightly reduce frequency, watering only when the top layer dries.
How do I know when Cosmos bipinnatus is ready to harvest?
Harvest for cut flowers when the outer petals are fully opened and the center disc is mature but not yet dried out. If you’re harvesting seed, let flowers fully dry on the plant until the seed heads turn tan/brown and feel crisp, then collect the dry seeds. Cosmos typically reaches maturity in about 70 days, but harvest timing is best judged by flower opening stage (for blooms) or seed-head dryness (for seed).

Today's Conditions

Outdoor planting for Double Click in Zone 6b typically begins around 2026-04-25. Wait until soil reaches at least 55°F before transplanting Double Click.

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting Double Click.

Today's Conditions

Outdoor planting for Double Click in Zone 6b typically begins around 2026-04-25. Wait until soil reaches at least 55°F before transplanting Double Click.

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting Double Click.

Sowing Tips

Transplant Conditions

Wait until soil reaches 55°F and nights stay above 45°F before moving outdoors. Harden off for 7 days first.

Expert Note

For the most continuous cutting, sow thinly or transplant into full sun and pinch lightly once early growth is established, then keep watering consistent until established.