Growing Welsh Onion in Zone 2a
Zone 2a has harsh winters and a short growing season. Start Welsh Onion early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 15.
Planting Calendar
Season: May 15 – Sep 15 (123 days)
When to Plant Welsh Onion in Zone 2a
Start Seeds Indoors: Mar 6
Start Welsh Onion seeds indoors around Mar 6 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.
Transplant Outdoors: Apr 17
Transplant Welsh Onion seedlings outdoors after Apr 17. Wait until soil temperature reaches 45°F. Space plants at 6/sqft. Harden off plants for a week before moving outside.
Harvest: Jul 6
First harvest approximately Jul 6 (~80 days from transplant). Continue harvesting until first frost (Sep 15).
Welsh Onion 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 Welsh Onion in Zone 2a?
Start Welsh Onion seeds indoors around Mar 6. Transplant outdoors after Apr 17. Expect first harvest around Jul 6.
What is the last frost date for Zone 2a?
The average last spring frost date for Zone 2a is May 15. The first fall frost averages Sep 15, giving a 123-day growing season.
Can I grow Welsh Onion in Zone 2a?
Yes. Welsh Onion needs 60 days to harvest. Zone 2a has a 123-day growing season, which is sufficient.
What is the best month to plant Welsh Onion in Zone 2a?
The best time to start Welsh Onion in Zone 2a is Mar. Begin seeds indoors around Mar 6, then transplant outdoors after the last frost date of May 15.
How long does Welsh Onion take to harvest?
Welsh Onion takes approximately 60 days from planting to harvest. In Zone 2a, expect your first harvest around Jul 6.
Plan Your Welsh Onion Garden
Track Welsh Onion from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Welsh Onion Growing Guide