Growing Watercress in Zone 7b
Zone 7b has mild winters and a long growing season — good conditions for Watercress. Last frost: Apr 10. First frost: Nov 7.
Planting Calendar
Season: Apr 10 – Nov 7 (211 days) · Succession: plant every 2 weeks (up to 11x)
When to Plant Watercress in Zone 7b
Start Seeds Indoors: Feb 27
Start Watercress seeds indoors around Feb 27 (6 weeks before last frost). Optimal germination temperature: 60°F. Germinates in 7–14 days.
Transplant Outdoors: Mar 27
Transplant Watercress seedlings outdoors after Mar 27. Wait until soil temperature reaches 45°F. Space plants at 6/sqft. Harden off plants for a week before moving outside.
Harvest: May 1
First harvest approximately May 1 (~35 days from transplant). Continue harvesting until first frost (Nov 7). Watercress can overwinter in mild climates for continued harvest.
Fall Planting: Sep 26
For a fall harvest, plant Watercress around Sep 26 (6 weeks before first frost).
Watercress 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 13bFrequently Asked Questions
When should I plant Watercress in Zone 7b?
Start Watercress seeds indoors around Feb 27. Transplant outdoors after Mar 27. Expect first harvest around May 1.
What is the last frost date for Zone 7b?
The average last spring frost date for Zone 7b is Apr 10. The first fall frost averages Nov 7, giving a 211-day growing season.
Can I grow Watercress in Zone 7b?
Yes. Watercress needs 50 days to harvest. Zone 7b has a 211-day growing season, which is sufficient. You can plant up to 11 successions.
What is the best month to plant Watercress in Zone 7b?
The best time to start Watercress in Zone 7b is Feb. Begin seeds indoors around Feb 27, then transplant outdoors after the last frost date of Apr 10.
How long does Watercress take to harvest?
Watercress takes approximately 50 days from planting to harvest. In Zone 7b, expect your first harvest around May 1.
Plan Your Watercress Garden
Track Watercress from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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