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🌺 Growing Nasturtium in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Nasturtium early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 27Aug 28

Season: May 25 – Aug 28 (95 days)

Zone1b

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest45

SunFull Sun

Frost ToleranceNone

Spacing4/sqft (6" apart)

When to Plant Nasturtium in Zone 1b

Start Seeds Indoors: Apr 27

Start Nasturtium seeds indoors around Apr 27 (4 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Jun 1

Transplant Nasturtium seedlings outdoors after Jun 1. Wait until soil temperature reaches 55°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Jul 11

First harvest approximately Jul 11 (~40 days from transplant). Continue harvesting until first frost (Aug 28).

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 1b?

Start Nasturtium seeds indoors around Apr 27. Transplant outdoors after Jun 1. Expect first harvest around Jul 11.

What is the last frost date for Zone 1b?

The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Nasturtium in Zone 1b?

Yes. Nasturtium needs 45 days to harvest. Zone 1b has a 95-day growing season, which is sufficient.

What is the best month to plant Nasturtium in Zone 1b?

The best time to start Nasturtium in Zone 1b is Apr. Begin seeds indoors around Apr 27, then transplant outdoors after the last frost date of May 25.

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 1b, expect your first harvest around Jul 11.

Plan Your Nasturtium Garden

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

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