When should I plant Shepherd's Purse in Zone 3b?

Direct sow Shepherd's Purse outdoors around Apr 3. Harvest around May 18.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.

Can I grow Shepherd's Purse in Zone 3b?

Yes. Shepherd's Purse needs 45 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.

Growing Shepherd's Purse in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Shepherd's Purse early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.

Planting Calendar

Outdoor

Harvest

Apr 3Sep 22

Season: May 15 – Sep 22 (130 days)

Zone3b

Last FrostMay 15

First FrostSep 22

Season Length130 days

Days to Harvest45

Sunfull-to-part

Frost ToleranceHeavy

Spacing16/sqft (3" apart)

When to Plant Shepherd's Purse in Zone 3b

Sow Seeds Outdoors: Apr 3

Direct sow Shepherd's Purse seeds outdoors around Apr 3. Soil temperature should be at least 35°F. Space at 16/sqft (3" apart).

Harvest: May 18

First harvest approximately May 18 (~45 days from planting). Continue harvesting until first frost (Sep 22). Shepherd's Purse can overwinter in mild climates for continued harvest.

Fall Planting: Jul 28

For a fall harvest, plant Shepherd's Purse around Jul 28 (8 weeks before first frost).

Shepherd's Purse 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 Shepherd's Purse Garden

Track Shepherd's Purse from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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