When should I plant Nasturtium in Zone 12a?

Start Nasturtium seeds indoors around Dec 4. Transplant outdoors after Jan 8. Expect first harvest around Feb 17.

What is the last frost date for Zone 12a?

The average last spring frost date for Zone 12a is Jan 1. The first fall frost averages Dec 31, giving a 364-day growing season.

Can I grow Nasturtium in Zone 12a?

Yes. Nasturtium needs 45 days to harvest. Zone 12a has a 364-day growing season, which is sufficient.

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🌺 Growing Nasturtium in Zone 12a

Zone 12a has a year-round growing season. Nasturtium can be planted almost any time with proper planning. Last frost: Jan 1. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 4Dec 31

Season: Jan 1 – Dec 31 (364 days)

Zone12a

Last FrostJan 1

First FrostDec 31

Season Length364 days

Days to Harvest45

SunFull Sun

Frost ToleranceNone

Spacing4/sqft (6" apart)

When to Plant Nasturtium in Zone 12a

Start Seeds Indoors: Dec 4

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

Transplant Outdoors: Jan 8

Transplant Nasturtium seedlings outdoors after Jan 8. Wait until soil temperature reaches 55°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Feb 17

First harvest approximately Feb 17 (~40 days from transplant). Continue harvesting until first frost (Dec 31).

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

Plan Your Nasturtium Garden

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

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