When should I plant Kesäkurpitsa in Zone 4a?

Start Kesäkurpitsa seeds indoors around Apr 7. Transplant outdoors after May 19. Expect first harvest around Jun 23.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Can I grow Kesäkurpitsa in Zone 4a?

Yes. Kesäkurpitsa needs 50 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 4 successions.

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🥒 Growing Kesäkurpitsa in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Kesäkurpitsa in this zone. Viimeinen halla: May 5. Ensimmäinen halla: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 7Oct 1

Season: May 5 – Oct 1 (149 päivää) · Succession: plant every 3 weeks (up to 4x)

Vyöhyke4a

Viimeinen hallaMay 5

Ensimmäinen hallaOct 1

Kausi149 päivää

Sato50 päivää

AurinkoTäysi Aurinko

When to Plant Kesäkurpitsa in Zone 4a

Start Seeds Indoors: Apr 7

Start Kesäkurpitsa seeds indoors around Apr 7 (4 viikkoa ennen viimeistä hallaa). Optimal germination temperature: 85F. Germinates in 4-10 days.

Transplant Outdoors: May 19

Transplant Kesäkurpitsa seedlings outdoors after May 19. Wait until soil temperature reaches 65F. Space plants at 1/m² (30cm välein). Harden off plants for a week before moving outside.

Harvest: Jun 23

First harvest approximately Jun 23 (~35 päivää from transplant). Continue harvesting until first frost (Oct 1).

Fall Planting: Jul 23

For a fall harvest, plant Kesäkurpitsa around Jul 23 (10 weeks before first frost).

Kumppaniviljely

✅ Maissi✅ Pavut✅ Krassit✅ Hunajakukka

❌ Perunat

Kesäkurpitsa 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

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