Growing Bok Choy in Zone 9a

Zone 9a has warm winters and an extended growing season — excellent for heat-loving crops like Bok Choy. Last frost: Mar 20. First frost: Nov 12.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 6Nov 12

Season: Mar 20 – Nov 12 (237 days) · Succession: plant every 2 weeks (up to 13x)

Zone9a

Last FrostMar 20

First FrostNov 12

Season Length237 days

Days to Harvest45

SunPart Sun / Part Shade

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Bok Choy in Zone 9a

Start Seeds Indoors: Feb 6

Start Bok Choy seeds indoors around Feb 6 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–8 days.

Transplant Outdoors: Mar 13

Transplant Bok Choy seedlings outdoors after Mar 13. Wait until soil temperature reaches 45°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Apr 17

First harvest approximately Apr 17 (~35 days from transplant). Continue harvesting until first frost (Nov 12).

Fall Planting: Sep 24

For a fall harvest, plant Bok Choy around Sep 24 (7 weeks before first frost).

Companion Planting

✅ Carrots✅ Beets✅ Dill✅ Onions✅ Beans

❌ Strawberries

Bok Choy 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

Frequently Asked Questions

When should I plant Bok Choy in Zone 9a?

Start Bok Choy seeds indoors around Feb 6. Transplant outdoors after Mar 13. Expect first harvest around Apr 17.

What is the last frost date for Zone 9a?

The average last spring frost date for Zone 9a is Mar 20. The first fall frost averages Nov 12, giving a 237-day growing season.

Can I grow Bok Choy in Zone 9a?

Yes. Bok Choy needs 45 days to harvest. Zone 9a has a 237-day growing season, which is sufficient. You can plant up to 13 successions.

What is the best month to plant Bok Choy in Zone 9a?

The best time to start Bok Choy in Zone 9a is Feb. Begin seeds indoors around Feb 6, then transplant outdoors after the last frost date of Mar 20.

What companion plants grow well with Bok Choy?

Good companion plants for Bok Choy include Carrots, Beets, Dill, Onions, Beans. Avoid planting Bok Choy near Strawberries.

How long does Bok Choy take to harvest?

Bok Choy takes approximately 45 days from planting to harvest. In Zone 9a, expect your first harvest around Apr 17.

Plan Your Bok Choy Garden

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

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