When should I plant Thai Basil in Zone 4a?

Start Thai Basil seeds indoors around 3月24日. Transplant outdoors after 5月19日. Expect first harvest around 6月18日.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is 5月5日. The first fall frost averages 10月1日, giving a 149-day growing season.

Can I grow Thai Basil in Zone 4a?

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

种植 Thai Basil 区域 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Thai Basil in this zone. 末次霜冻: 5月5日. 初次霜冻: 10月1日.

Planting Calendar

Indoor

Outdoor

Harvest

3月24日10月1日

Season: 5月5日 – 10月1日 (149 天) · Succession: plant every 3 weeks (up to 5x)

区域4a

末次霜冻5月5日

初次霜冻10月1日

生长季149 天

收获40 天

日照全日照

When to Plant Thai Basil in Zone 4a

Start Seeds Indoors: 3月24日

Start Thai Basil seeds indoors around 3月24日 (6 周(最后霜冻前)). Optimal germination temperature: 80F. Germinates in 5-10 days.

Transplant Outdoors: 5月19日

Transplant Thai Basil seedlings outdoors after 5月19日. Wait until soil temperature reaches 60F. Space plants at 4/m² (15cm 间距). Harden off plants for a week before moving outside.

Harvest: 6月18日

First harvest approximately 6月18日 (~30 天 from transplant). Continue harvesting until first frost (10月1日).

Thai Basil 其他区域

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

规划花园 Thai Basil

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

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