🌿 When to Plant Rosemary
Perennial in zones 7+; grow as annual or overwinter indoors in colder zones
📅 Planting Calendar by USDA Zone
Rosemary is a warm-season crop — plant it after your last spring frost, once the soil has warmed, and start seeds indoors a few weeks ahead for a head start. Find the exact start-indoors, transplant, and direct-sow dates for your USDA zone in the table below.
Select your zone to highlight your dates. All dates are calculated from each zone's average frost dates — see how we calculate them.
| Zone | Last Frost | Start Indoors | Transplant | Direct Sow |
|---|---|---|---|---|
| Zone 2A | May 30 | Mar 21 | May 30 | — |
| Zone 3B | May 15 | Mar 6 | May 15 | — |
| Zone 4A | May 8 | Feb 27 | May 8 | — |
| Zone 4B | May 1 | Feb 20 | May 1 | — |
| Zone 5A | Apr 25 | Feb 14 | Apr 25 | — |
| Zone 5B | Apr 18 | Feb 7 | Apr 18 | — |
| Zone 6A | Apr 21 | Feb 10 | Apr 21 | — |
| Zone 6B | Apr 10 | Jan 30 | Apr 10 | — |
| Zone 7A | Apr 5 | Jan 25 | Apr 5 | — |
| Zone 7B | Mar 28 | Jan 17 | Mar 28 | — |
| Zone 8A | Mar 20 | Jan 9 | Mar 20 | — |
| Zone 8B | Mar 12 | Jan 1 | Mar 12 | — |
| Zone 9A | Feb 28 | Dec 20 | Feb 28 | — |
| Zone 9B | Feb 15 | Dec 7 | Feb 15 | — |
| Zone 10A | Feb 1 | Nov 23 | Feb 1 | — |
| Zone 10B | Jan 15 | Nov 6 | Jan 15 | — |
| Zone 11A | Jan 1 | Oct 23 | Jan 1 | — |
Rosemary is a woody, perennial herb in warm climates and a fragrant container plant in cold ones.
Top Growing Tips
- Perennial in zones 8+ — treat as annual or bring indoors in colder zones
- Needs excellent drainage — hates wet feet
- Start from cuttings or transplants (very slow from seed)
- Drought-tolerant once established
- Prune regularly to prevent woody, leggy growth
Companion Planting
Good companions: beans, cabbage, carrots, sage
Avoid planting near: none in particular
Harvest Timeline
Snip sprigs anytime once plants are 6+ inches
Growing rosemary in your region?
These dates come from your zone's frost windows. For the full month-by-month plan — succession sowing, variety picks, and timing tuned to your climate, not just your zone — our regional vegetable-gardening guides cover your area start to finish.
Find your regional growing guide