Perennial herb
Sweet Marjoram plant profile
Origanum majorana
A perennial herb for full sun.
Last updated .
When to plant
When to plant Sweet Marjoram
Start seeds indoors
10 weeks before your last spring frost to 8 weeks before your last spring frost
Direct sow
at your last spring frost
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Spacing
- 12 to 18 in apart
Common problems
Watch for these
Also watch for: leafhoppers, woody growth, frost sensitivity.
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Marjoram
UC Master Gardeners of Santa Clara County (UC Agriculture and Natural Resources). Supports indoor seed-starting timing (direct) and direct-sowing timing (normalized). Checked 2026-06-13.
- Toxic and Non-Toxic Plants: Marjoram (Origanum majorana) entry
ASPCA Animal Poison Control Center. Supports pet-safety verdicts for dogs and cats. Checked 2026-07-18.