When should I plant Slnečnica in Zone 4b?

Start Slnečnica seeds indoors around Apr 10. Transplant outdoors after May 8. Expect first harvest around Jul 12.

What is the last frost date for Zone 4b?

The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.

Can I grow Slnečnica in Zone 4b?

Yes. Slnečnica needs 90 days to harvest. Zone 4b has a 157-day growing season, which is sufficient. You can plant up to 4 successions.

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🌻 Growing Slnečnica in Zone 4b

Zone 4b has cold winters and a moderate growing season. Timing is key for Slnečnica in this zone. Posledný mráz: May 1. Prvý mráz: Oct 5.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 10Oct 5

Season: May 1 – Oct 5 (157 dní) · Succession: plant every 2 weeks (up to 4x)

Zóna4b

Posledný mrázMay 1

Prvý mrázOct 5

Sezóna157 dní

Úroda90 dní

SlnkoPlné Slnko

When to Plant Slnečnica in Zone 4b

Start Seeds Indoors: Apr 10

Start Slnečnica seeds indoors around Apr 10 (3 týždňov pred posledným mrazom). Optimal germination temperature: 75F. Germinates in 7-14 days.

Transplant Outdoors: May 8

Transplant Slnečnica seedlings outdoors after May 8. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm rozostup). Harden off plants for a week before moving outside.

Harvest: Jul 12

First harvest approximately Jul 12 (~65 dní from transplant). Continue harvesting until first frost (Oct 5).

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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