When should I plant Sipuli in Zone 4a?

Start Sipuli seeds indoors around Feb 24. Transplant outdoors after Apr 7. Expect first harvest around Jun 26.

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 Sipuli in Zone 4a?

Yes. Sipuli needs 110 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

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🧅 Growing Sipuli in Zone 4a

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

Planting Calendar

Indoor

Outdoor

Harvest

Feb 24Oct 1

Season: May 5 – Oct 1 (149 päivää)

Vyöhyke4a

Viimeinen hallaMay 5

Ensimmäinen hallaOct 1

Kausi149 päivää

Sato110 päivää

AurinkoTäysi Aurinko

When to Plant Sipuli in Zone 4a

Start Seeds Indoors: Feb 24

Start Sipuli seeds indoors around Feb 24 (10 viikkoa ennen viimeistä hallaa). Optimal germination temperature: 70F. Germinates in 7-14 days.

Transplant Outdoors: Apr 7

Transplant Sipuli seedlings outdoors after Apr 7. Wait until soil temperature reaches 45F. Space plants at 9/m² (10cm välein). Harden off plants for a week before moving outside.

Harvest: Jun 26

First harvest approximately Jun 26 (~80 päivää from transplant). Continue harvesting until first frost (Oct 1).

Kumppaniviljely

✅ Mansikat✅ Kaali✅ Punajuuret✅ Salaatti✅ Porkkanat✅ Tomaatit

❌ Pavut❌ Herneet

Sipuli 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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