SproutSmart
SproutSmart™ Intelligent Garden Sowing

When to Plant Cosmos in Zone 2a

Family: Asteraceae Annual flowering plant

Planting Schedule

Add Cosmos to your garden to build a schedule and get reminders.

Your Zone 2a Cosmos cheat sheet. All the dates and companions you need to get seeds in the ground successfully

Want the complete botanical breakdown and expert growing tips?

View Cosmos Guide
Botanical illustration of Cosmos

Crop Dates : 2a

MilestoneDate
Start IndoorsMay 4th
Last FrostMay 25th
Transplant / Sow OutdoorsMay 25th
Harvest BeginsJul 24th
Harvest EndsAug 29th