Home › When to plant › Onions
When to plant onions
Advertisement
Onions planting guide
Plant sets or transplants 2-4 weeks before the last frost; pick long-day varieties in the north, short-day in the south.
Frost-tolerant (cool-season) crop. Typical days to maturity: 100.
Onions planting dates by zone
| Zone | Start indoors | Transplant |
|---|---|---|
| Zone 3 | Mar 11 – Mar 25 | Apr 22 – May 13 |
| Zone 4 | Mar 1 – Mar 15 | Apr 12 – May 3 |
| Zone 5 | Feb 19 – Mar 5 | Apr 2 – Apr 23 |
| Zone 6 | Feb 9 – Feb 23 | Mar 23 – Apr 13 |
| Zone 7 | Jan 30 – Feb 13 | Mar 13 – Apr 3 |
| Zone 8 | Jan 14 – Jan 28 | Feb 25 – Mar 18 |
| Zone 9 | Dec 17 – Dec 31 | Jan 28 – Feb 18 |
| Zone 10 | Nov 22 – Dec 6 | Jan 3 – Jan 24 |
Based on average frost dates for each zone in 2027; check your local frost date.
FAQ
When should I plant onions?
Plant sets or transplants 2-4 weeks before the last frost; pick long-day varieties in the north, short-day in the south.
How long do onions take to grow?
About 100 days to first harvest for typical varieties.
Other crops
- Tomatoes
- Peppers
- Eggplant
- Cucumbers
- Zucchini
- Pumpkins
- Winter Squash
- Watermelon
- Cantaloupe
- Green Beans
- Sweet Corn
- Okra
- Lettuce
- Spinach
- Kale
- Broccoli
- Cabbage
- Cauliflower
- Brussels Sprouts
- Carrots
- Beets
- Radishes
- Peas
- Garlic
- Potatoes
- Sweet Potatoes
- Swiss Chard
- Arugula
- Basil
- Cilantro
- Parsley
- Celery
- Leeks
- Asparagus
- Strawberries
- Sunflowers
- Turnips
Advertisement
Free calculator by FrostWise