🍃When to Plant Spinach (2026)
Very cold-hardy. One of the first things you can sow in spring.
- Type: Cool-season
- Method: Direct sow
- Days to harvest: 40
- Spacing: 4" apart
- Sun: Full sun to part shade
- Companions: radish, strawberry, peas
Is Spinach right for your USDA zone?
Spinach is a cool-season crop, which means it thrives in the mild temperatures of spring and fall. Gardeners in zones 3a through 7b get the longest spinach season — you can plant in early spring and again in late summer for a fall harvest. In warmer zones (8a-10b), grow spinach as a winter crop from October through February when temperatures are coolest.
Spinach needs about 40 days from sowing to harvest, so any zone with at least 54frost-free days can grow it successfully. Check your zone's specific dates in the table below.
How to grow spinach
Spinach grows best when direct-sown right where it will mature, because it dislikes having its roots disturbed. Give each plant 4 inches of room in full sun to part shade, and keep the soil consistently moist while seeds germinate and plants establish.
Expect roughly 40 days to your first harvest. Watch for leaf miner, aphids, the most common pests of spinach, and scout plants weekly so you can act early. Soak seeds in water for 12-24 hours before sowing to soften the tough seed coat and speed germination, especially when soil is still cool. Spinach germinates best in soil between 40-70°F.
Troubleshooting spinach
Leaf miners tunnel inside leaves creating winding translucent trails. Remove and destroy affected leaves immediately—do not compost. Row cover at planting prevents the adult fly from laying eggs.
Growing spinach in containers
Shallow 6-inch deep containers are plenty—spinach has a modest root system. Great for windowsill growing indoors year-round. One 12-inch pot provides enough for weekly salads.
Spinach planting dates by zone (2026)
| Zone | Start Indoors | Sow / Transplant | Harvest From |
|---|---|---|---|
| Zone 3a | — | Apr 10 | May 20 |
| Zone 3b | — | Apr 10 | May 20 |
| Zone 4a | — | Apr 5 | May 15 |
| Zone 4b | — | Mar 31 | May 10 |
| Zone 5a | — | Mar 26 | May 5 |
| Zone 5b | — | Mar 21 | Apr 30 |
| Zone 6a | — | Mar 16 | Apr 25 |
| Zone 6b | — | Mar 11 | Apr 20 |
| Zone 7a | — | Mar 6 | Apr 15 |
| Zone 7b | — | Mar 1 | Apr 10 |
| Zone 8a | — | Feb 18 | Mar 30 |
| Zone 8b | — | Feb 8 | Mar 20 |
| Zone 9a | — | Jan 21 | Mar 2 |
| Zone 9b | — | Jan 6 | Feb 15 |
| Zone 10a | — | Dec 27 | Feb 5 |
| Zone 10b | — | Dec 11 | Jan 20 |
Spinach planting FAQ
When is the best time to plant spinach?
Spinach is a cool-season crop. Plant it in early spring as soon as the soil can be worked, and again in late summer for a fall harvest. It tolerates light frost. Find the exact date for your USDA zone in the table below.
How long does spinach take to grow?
Spinach takes about 40 days from sowing to first harvest. It is best direct-sown rather than transplanted.
How far apart should I space spinach?
Space spinach about 4 inches apart in full sun to part shade. Proper spacing gives roots room to spread and improves airflow, which reduces disease.
What is the best growing tip for spinach?
Soak seeds in water for 12-24 hours before sowing to soften the tough seed coat and speed germination, especially when soil is still cool. Spinach germinates best in soil between 40-70°F.
What are common problems with spinach?
Leaf miners tunnel inside leaves creating winding translucent trails. Remove and destroy affected leaves immediately—do not compost. Row cover at planting prevents the adult fly from laying eggs.
Can I grow spinach in a container?
Shallow 6-inch deep containers are plenty—spinach has a modest root system. Great for windowsill growing indoors year-round. One 12-inch pot provides enough for weekly salads.
Can I plant spinach for a second harvest?
Yes—sow in late summer (August in zones 5+, September in zones 7+) for a fall and early winter harvest. Spinach thrives in cooling weather and can survive temperatures down to 15-20°F.
What grows well with spinach?
Good companion plants for spinach are radish, strawberry, peas. Companion planting can deter pests and make better use of garden space. Rotate where you plant spinach each year to keep soil healthy.