When should I plant Heřánek in Zone 4a?

Start Heřánek seeds indoors around Mar 24. Transplant outdoors after Apr 28. Expect first harvest around Jun 12.

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 Heřánek in Zone 4a?

Yes. Heřánek needs 60 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

Growing Heřánek in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Heřánek in this zone. Poslední mráz: May 5. První mráz: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 24Oct 1

Season: May 5 – Oct 1 (149 dní)

Zóna4a

Poslední mrázMay 5

První mrázOct 1

Sezóna149 dní

Sklizeň60 dní

SluncePlné Slunce

When to Plant Heřánek in Zone 4a

Start Seeds Indoors: Mar 24

Start Heřánek seeds indoors around Mar 24 (6 týdnů před posledním mrazem). Optimal germination temperature: 65F. Germinates in 7-14 days.

Transplant Outdoors: Apr 28

Transplant Heřánek seedlings outdoors after Apr 28. Wait until soil temperature reaches 45F. Space plants at 8/m². Harden off plants for a week before moving outside.

Harvest: Jun 12

First harvest approximately Jun 12 (~45 dní from transplant). Continue harvesting until first frost (Oct 1).

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

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