When should I plant Ui in Zone 10a?

Start Ui seeds indoors around Dec 12. Transplant outdoors after Jan 23. Expect first harvest around Apr 13.

What is the last frost date for Zone 10a?

The average last spring frost date for Zone 10a is Feb 20. The first fall frost averages Dec 1, giving a 284-day growing season.

Can I grow Ui in Zone 10a?

Yes. Ui needs 110 days to harvest. Zone 10a has a 284-day growing season, which is sufficient.

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🧅 Kweken van Ui in Zone 10a

Zone 10a has a year-round growing season. Ui can be planted almost any time with proper planning. Laatste vorst: Feb 20. Eerste vorst: Dec 1.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 12Dec 1

Season: Feb 20 – Dec 1 (284 dagen)

Zone10a

Laatste vorstFeb 20

Eerste vorstDec 1

Seizoen284 dagen

Oogst110 dagen

ZonVolle Zon

When to Plant Ui in Zone 10a

Start Seeds Indoors: Dec 12

Start Ui seeds indoors around Dec 12 (10 weken voor de laatste vorst). Optimal germination temperature: 70F. Germinates in 7-14 days.

Transplant Outdoors: Jan 23

Transplant Ui seedlings outdoors after Jan 23. Wait until soil temperature reaches 45F. Space plants at 9/m² (10cm afstand). Harden off plants for a week before moving outside.

Harvest: Apr 13

First harvest approximately Apr 13 (~80 dagen from transplant). Continue harvesting until first frost (Dec 1).

Begeleidende Beplanting

✅ Aardbeien✅ Kool✅ Rode Bieten✅ Sla✅ Wortels✅ Tomaten

❌ Bonen❌ Erwten

Ui in Andere 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 Je Tuin voor Ui

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

Start Free Ui Growing Guide