Growing Lemongrass in Zone 3b
Zone 3b has harsh winters and a short growing season. Start Lemongrass early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.
Planting Calendar
Season: May 15 – Sep 22 (130 days)
When to Plant Lemongrass in Zone 3b
Start Seeds Indoors: Mar 20
Start Lemongrass seeds indoors around Mar 20 (8 weeks before last frost). Optimal germination temperature: 80°F. Germinates in 14–21 days.
Transplant Outdoors: Jun 5
Transplant Lemongrass seedlings outdoors after Jun 5. Wait until soil temperature reaches 65°F. Space plants at 24/sqft. Harden off plants for a week before moving outside.
Harvest: Aug 19
First harvest approximately Aug 19 (~75 days from transplant). Continue harvesting until first frost (Sep 22).
Lemongrass in Other Zones
1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13bFrequently Asked Questions
When should I plant Lemongrass in Zone 3b?
Start Lemongrass seeds indoors around Mar 20. Transplant outdoors after Jun 5. Expect first harvest around Aug 19.
What is the last frost date for Zone 3b?
The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.
Can I grow Lemongrass in Zone 3b?
Yes. Lemongrass needs 120 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.
What is the best month to plant Lemongrass in Zone 3b?
The best time to start Lemongrass in Zone 3b is Mar. Begin seeds indoors around Mar 20, then transplant outdoors after the last frost date of May 15.
How long does Lemongrass take to harvest?
Lemongrass takes approximately 120 days from planting to harvest. In Zone 3b, expect your first harvest around Aug 19.
Plan Your Lemongrass Garden
Track Lemongrass from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Lemongrass Growing Guide