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🌺 Growing Nasturtium in Zone 10a

Zone 10a has a year-round growing season. Nasturtium can be planted almost any time with proper planning. Last frost: Feb 20. First frost: Dec 1.

Planting Calendar

Indoor

Outdoor

Harvest

Jan 23Dec 1

Season: Feb 20 – Dec 1 (284 days)

Zone10a

Last FrostFeb 20

First FrostDec 1

Season Length284 days

Days to Harvest45

SunFull Sun

Frost ToleranceNone

Spacing4/sqft (6" apart)

When to Plant Nasturtium in Zone 10a

Start Seeds Indoors: Jan 23

Start Nasturtium seeds indoors around Jan 23 (4 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Feb 27

Transplant Nasturtium seedlings outdoors after Feb 27. Wait until soil temperature reaches 55°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Apr 8

First harvest approximately Apr 8 (~40 days from transplant). Continue harvesting until first frost (Dec 1).

Companion Planting

✅ Cucumbers✅ Squash✅ Pumpkins✅ Radishes✅ Cabbage

Nasturtium 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 Nasturtium in Zone 10a?

Start Nasturtium seeds indoors around Jan 23. Transplant outdoors after Feb 27. Expect first harvest around Apr 8.

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 Nasturtium in Zone 10a?

Yes. Nasturtium needs 45 days to harvest. Zone 10a has a 284-day growing season, which is sufficient.

What is the best month to plant Nasturtium in Zone 10a?

The best time to start Nasturtium in Zone 10a is Jan. Begin seeds indoors around Jan 23, then transplant outdoors after the last frost date of Feb 20.

What companion plants grow well with Nasturtium?

Good companion plants for Nasturtium include Cucumbers, Squash, Pumpkins, Radishes, Cabbage.

How long does Nasturtium take to harvest?

Nasturtium takes approximately 45 days from planting to harvest. In Zone 10a, expect your first harvest around Apr 8.

Plan Your Nasturtium Garden

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

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