When should I plant Nasturtium in Zone 9a?

Start Nasturtium seeds indoors around Feb 20. Transplant outdoors after Mar 27. Expect first harvest around May 6.

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 Nasturtium in Zone 9a?

Yes. Nasturtium needs 45 days to harvest. Zone 9a has a 237-day growing season, which is sufficient.

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🌺 Growing Nasturtium in Zone 9a

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

Planting Calendar

Indoor

Outdoor

Harvest

Feb 20Nov 12

Season: Mar 20 – Nov 12 (237 days)

Zone9a

Last FrostMar 20

First FrostNov 12

Season Length237 days

Days to Harvest45

SunFull Sun

Frost ToleranceNone

Spacing4/sqft (6" apart)

When to Plant Nasturtium in Zone 9a

Start Seeds Indoors: Feb 20

Start Nasturtium seeds indoors around Feb 20 (4 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Mar 27

Transplant Nasturtium seedlings outdoors after Mar 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: May 6

First harvest approximately May 6 (~40 days from transplant). Continue harvesting until first frost (Nov 12).

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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