Petunia

Petunia

Petunia × atkinsiana

Plant out around your last spring frost. Space plants 12 in (30 cm) apart.

Photo: Dandy1022, CC BY-SA 4.0 · source

When to plant

Timed from your frost dates, so it holds wherever you garden. Give yours and every step below becomes a date.

See the dates for your garden

Enter your average last spring frost and first fall frost. Every timing on this site turns into a calendar date. Not sure of yours? Your local extension service or a search for “last frost date” and your town will tell you; the app finds them from your location.

Last spring frost
First fall frost

Saved in this browser only. Nothing is sent anywhere.

Optimal Transplant

From a plantRecommended from a plant
  1. Plant outaround your last spring frost
  2. First harvestabout 70 days after planting out

Optimal Indoor Start

From seedRecommended from seed
  1. Start indoors8 weeks before your last spring frost
  2. Begin hardening off1 week before your last spring frost
  3. Plant outaround your last spring frost
  4. First harvestabout 70 days after sowing

Growing petunia

Spacing in the row
12 in (30 cm)
Between rows
12 in (30 cm)
Planting depth
Surface sow; press in lightly and do not cover (needs light to germinate)
Sun
Full Sun
Life cycle
Annual

Feeding

How often
Every 2 weeks during active growth. Work a balanced fertilizer into beds at planting; spreading types and plants in containers or baskets do best with a dilute liquid feed weekly.

Your petunia, planned to the day.

Canopy turns these timings into dates from your own frost data, places every plant at its spacing on your garden map, and tracks it all the way to harvest.

Add petunia to your planting calendar →

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