Growing Rosemary in Zone 3B

Rosemary is a woody, perennial herb in warm climates and a fragrant container plant in cold ones.

Zone 3B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.

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

About Zone 3B

USDA Hardiness Zone 3B has an average last spring frost around May 15 and first fall frost around Sep 15. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.