When should I plant Squash in Zone 1b?

Start Squash seeds indoors around Apr 27. Transplant outdoors after Jun 8. Expect first harvest around Jul 23.

What is the last frost date for Zone 1b?

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

Can I grow Squash in Zone 1b?

Yes. Squash needs 55 days to harvest. Zone 1b has a 95-day growing season, which is sufficient. You can plant up to 1 successions.

🟡

🟡 Growing Squash in Zone 1b

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

Planting Calendar

Indoor

Outdoor

Harvest

Apr 27Aug 28

Season: May 25 – Aug 28 (95 days) · Succession: plant every 3 weeks (up to 1x)

Zone1b

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest55

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Squash in Zone 1b

Start Seeds Indoors: Apr 27

Start Squash seeds indoors around Apr 27 (4 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 4–10 days.

Transplant Outdoors: Jun 8

Transplant Squash seedlings outdoors after Jun 8. Wait until soil temperature reaches 65°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Jul 23

First harvest approximately Jul 23 (~45 days from transplant). Continue harvesting until first frost (Aug 28).

Squash 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 Squash Garden

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

Start Free Squash Growing Guide