When should I plant ریحان in Zone 4a?

Start ریحان seeds indoors around Mar 24. Transplant outdoors after May 19. Expect first harvest around Jun 18.

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 ریحان in Zone 4a?

Yes. ریحان needs 40 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 5 successions.

🌿

🌿 Growing ریحان in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for ریحان in this zone. آخرین یخبندان: May 5. اولین یخبندان: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 24Oct 1

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

منطقه4a

آخرین یخبندانMay 5

اولین یخبندانOct 1

فصل149 روز

برداشت40 روز

آفتابآفتاب کامل

When to Plant ریحان in Zone 4a

Start Seeds Indoors: Mar 24

Start ریحان seeds indoors around Mar 24 (6 هفته قبل از آخرین سرمازدگی). Optimal germination temperature: 80F. Germinates in 5-10 days.

Transplant Outdoors: May 19

Transplant ریحان seedlings outdoors after May 19. Wait until soil temperature reaches 60F. Space plants at 4/متر² (15cm فاصله). Harden off plants for a week before moving outside.

Harvest: Jun 18

First harvest approximately Jun 18 (~30 روز from transplant). Continue harvesting until first frost (Oct 1).

کاشت همراه

✅ فلفل‌ها✅ گوجه‌فرنگی‌ها✅ بادمجان

❌ سداب

ریحان 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

Plan Your Garden ریحان

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

Start Free ریحان Growing Guide