When should I plant Water Parsley in Zone 3b?

Start Water Parsley seeds indoors around Mar 20. Transplant outdoors after May 1. Expect first harvest around Jun 20.

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 Water Parsley in Zone 3b?

Yes. Water Parsley needs 75 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.

Growing Water Parsley in Zone 3b

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

Planting Calendar

Indoor

Outdoor

Harvest

Mar 20Sep 22

Season: May 15 – Sep 22 (130 days)

Zone3b

Last FrostMay 15

First FrostSep 22

Season Length130 days

Days to Harvest75

Sunfull-to-part

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Water Parsley in Zone 3b

Start Seeds Indoors: Mar 20

Start Water Parsley seeds indoors around Mar 20 (8 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 14–28 days.

Transplant Outdoors: May 1

Transplant Water Parsley seedlings outdoors after May 1. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Jun 20

First harvest approximately Jun 20 (~50 days from transplant). Continue harvesting until first frost (Sep 22).

Companion Planting

✅ Watercress

Water Parsley 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 Water Parsley Garden

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

Start Free Water Parsley Growing Guide