When should I plant Spinach in Zone 1a?

Direct sow Spinach outdoors around Apr 13. Harvest around May 23.

What is the last frost date for Zone 1a?

The average last spring frost date for Zone 1a is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Spinach in Zone 1a?

Yes. Spinach needs 40 days to harvest. Zone 1a has a 95-day growing season, which is sufficient. You can plant up to 3 successions.

🍃

🍃 Growing Spinach in Zone 1a

Zone 1a has harsh winters and a short growing season. Start Spinach early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Planting Calendar

Outdoor

Harvest

Apr 13Aug 28

Season: May 25 – Aug 28 (95 days) · Succession: plant every 2 weeks (up to 3x)

Zone1a

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest40

SunPart Sun / Part Shade

Frost ToleranceHeavy

Spacing9/sqft (4" apart)

When to Plant Spinach in Zone 1a

Sow Seeds Outdoors: Apr 13

Direct sow Spinach seeds outdoors around Apr 13. Soil temperature should be at least 35°F. Space at 9/sqft (4" apart).

Harvest: May 23

First harvest approximately May 23 (~40 days from planting). Continue harvesting until first frost (Aug 28). Spinach can overwinter in mild climates for continued harvest.

Fall Planting: Jul 17

For a fall harvest, plant Spinach around Jul 17 (6 weeks before first frost).

Companion Planting

✅ Cauliflower ✅ Cabbage✅ Beans✅ Strawberries

Spinach 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 13b

Plan Your Spinach Garden

Track Spinach from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Spinach Growing Guide