When should I plant 洋葱 in Zone 5b?

Start 洋葱 seeds indoors around 2月17日. Transplant outdoors after 3月31日. Expect first harvest around 6月19日.

What is the last frost date for Zone 5b?

The average last spring frost date for Zone 5b is 4月28日. The first fall frost averages 10月8日, giving a 163-day growing season.

Can I grow 洋葱 in Zone 5b?

Yes. 洋葱 needs 110 days to harvest. Zone 5b has a 163-day growing season, which is sufficient.

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🧅 种植洋葱区域 5b

Zone 5b has cold winters and a moderate growing season. Timing is key for 洋葱 in this zone. 末次霜冻: 4月28日. 初次霜冻: 10月8日.

Planting Calendar

Indoor

Outdoor

Harvest

2月17日10月8日

Season: 4月28日 – 10月8日 (163 天)

区域5b

末次霜冻4月28日

初次霜冻10月8日

生长季163 天

收获110 天

日照全日照

When to Plant 洋葱 in Zone 5b

Start Seeds Indoors: 2月17日

Start 洋葱 seeds indoors around 2月17日 (10 周(最后霜冻前)). Optimal germination temperature: 70F. Germinates in 7-14 days.

Transplant Outdoors: 3月31日

Transplant 洋葱 seedlings outdoors after 3月31日. Wait until soil temperature reaches 45F. Space plants at 9/m² (10cm 间距). Harden off plants for a week before moving outside.

Harvest: 6月19日

First harvest approximately 6月19日 (~80 天 from transplant). Continue harvesting until first frost (10月8日).

伴生植物

✅ 草莓✅ 卷心菜✅ 甜菜✅ 生菜✅ 胡萝卜✅ 番茄

❌ 豆类❌ 豌豆

洋葱其他区域

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

规划花园洋葱

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

Start Free 洋葱 Growing Guide

🧅 种植 洋葱 区域 5b