When should I plant Slnečnica in Zone 3a?

Start Slnečnica seeds indoors around May 1. Transplant outdoors after May 29. Expect first harvest around Aug 2.

What is the last frost date for Zone 3a?

The average last spring frost date for Zone 3a is May 22. The first fall frost averages Sep 12, giving a 113-day growing season.

Can I grow Slnečnica in Zone 3a?

Yes. Slnečnica needs 90 days to harvest. Zone 3a has a 113-day growing season, which is sufficient. You can plant up to 1 successions.

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🌻 Growing Slnečnica in Zone 3a

Zone 3a has harsh winters and a short growing season. Start Slnečnica early indoors to maximize your harvest window. Posledný mráz: May 22. Prvý mráz: Sep 12.

Planting Calendar

Indoor

Outdoor

Harvest

May 1Sep 12

Season: May 22 – Sep 12 (113 dní) · Succession: plant every 2 weeks (up to 1x)

Zóna3a

Posledný mrázMay 22

Prvý mrázSep 12

Sezóna113 dní

Úroda90 dní

SlnkoPlné Slnko

When to Plant Slnečnica in Zone 3a

Start Seeds Indoors: May 1

Start Slnečnica seeds indoors around May 1 (3 týždňov pred posledným mrazom). Optimal germination temperature: 75F. Germinates in 7-14 days.

Transplant Outdoors: May 29

Transplant Slnečnica seedlings outdoors after May 29. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm rozostup). Harden off plants for a week before moving outside.

Harvest: Aug 2

First harvest approximately Aug 2 (~65 dní from transplant). Continue harvesting until first frost (Sep 12).

Sprievodné Sadenie

✅ Uhorky✅ Tekvica ✅ Kukurica✅ Fazuľa

❌ Zemiaky

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

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