Sweet Alyssum

Sweet Alyssum

Lobularia maritima

Sow outdoors 3 weeks before your last spring frost. Space plants 6 in (15 cm) apart.

Photo: Jules Verne Times Two, 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 Direct Sow

From seedRecommended
  1. Sow outdoors3 weeks before your last spring frost
  2. First harvestabout 60 days after sowing

Optimal Indoor Start

From seed
  1. Start indoors6 weeks before your last spring frost
  2. Begin hardening off2 weeks before your last spring frost
  3. Plant out1 week before your last spring frost
  4. First harvestabout 60 days after sowing

Growing sweet alyssum

Spacing in the row
6 in (15 cm)
Between rows
10 in (25 cm)
Planting depth
Surface sow; press in lightly, do not cover (needs light)
Sun
Full Sun
Mature height
3-6 in
Life cycle
Annual

Feeding

How often
Every 4-6 weeks during active growth. A light, balanced feed is plenty, and a light feed after shearing brings a new flush; in-ground plants in decent soil may need none, and heavy feeding means leaves over flowers.

Your sweet alyssum, 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 sweet alyssum to your planting calendar →

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