SproutSmart
SproutSmart™ Intelligent Garden Sowing

Double Click

Cosmos
Zone 1b Save Garden

Planting Schedule

Add Double Click to your garden to build a schedule and get reminders.
Botanical illustration of Double Click
70d to harvest

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.

Crop Dates

Growing note: Zone 1b has only 61 frost-free days — shorter than this crop's 70-day maturity. Outdoor planting is not viable; use protected cultivation.
MilestoneDate
Last FrostJun 1st
Growing ApproachProtected Environment Only

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

Today's Conditions

Outdoor planting for Double Click in Zone 1b typically begins around Indoor Lights Only. Wait until soil reaches at least 55°F before transplanting Double Click.

Garden Alerts

Zone 1b has only 61 frost-free days — shorter than this crop's 70-day maturity. Outdoor planting is not viable; use protected cultivation.

Recommended Companions

African Marigold Marigold
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Benary's Giant Zinnia
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Cupcakes Blush Cosmos
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Xanthos Cosmos
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Zahara Starlight Rose Zinnia
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Taishan Yellow Marigold
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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 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).
Botanical illustration of Double Click

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.

Today's Conditions

Outdoor planting for Double Click in Zone 1b typically begins around Indoor Lights Only. Wait until soil reaches at least 55°F before transplanting Double Click.

Garden Alerts

Zone 1b has only 61 frost-free days — shorter than this crop's 70-day maturity. Outdoor planting is not viable; use protected cultivation.

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 55°F for reliable germination and early growth.

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.