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Cosmos

flower

At a glance

USDA Zones
2–11
Sun
Full sun (6+ hrs)
Water
Low — drought-tolerant once established
Soil
loam, sandy
pH
neutral
Spacing
12 in. between plants
SFG per sq ft
1 plant per 1-ft cell

Planting & harvest windows

Northern Hemisphere timing. Adjust ±4–6 weeks based on your last/first frost dates.

ActivityJanFebMarAprMayJunJulAugSepOctNovDec
Plant
Harvest

Plant  Harvest

Good companions

Recommended varieties

Add Cosmos to your raised bed — the planner handles spacing and companion warnings automatically.

Open the planner →
← All plantsFull companion chart →