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🥬 Growing Swiss Chard in Zone 4b
Zone 4b has cold winters and a moderate growing season. Timing is key for Swiss Chard in this zone. Last frost: May 1. First frost: Oct 5.
Planting Calendar
Season: May 1 – Oct 5 (157 days)
When to Plant Swiss Chard in Zone 4b
Start Seeds Indoors: Apr 3
Start Swiss Chard seeds indoors around Apr 3 (4 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.
Transplant Outdoors: Apr 17
Transplant Swiss Chard seedlings outdoors after Apr 17. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.
Harvest: May 27
First harvest approximately May 27 (~40 days from transplant). Continue harvesting until first frost (Oct 5).
Fall Planting: Aug 10
For a fall harvest, plant Swiss Chard around Aug 10 (8 weeks before first frost).
Swiss Chard 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 Swiss Chard in Zone 4b?
Start Swiss Chard seeds indoors around Apr 3. Transplant outdoors after Apr 17. Expect first harvest around May 27.
What is the last frost date for Zone 4b?
The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.
Can I grow Swiss Chard in Zone 4b?
Yes. Swiss Chard needs 55 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.
What is the best month to plant Swiss Chard in Zone 4b?
The best time to start Swiss Chard in Zone 4b is Apr. Begin seeds indoors around Apr 3, then transplant outdoors after the last frost date of May 1.
How long does Swiss Chard take to harvest?
Swiss Chard takes approximately 55 days from planting to harvest. In Zone 4b, expect your first harvest around May 27.
Plan Your Swiss Chard Garden
Track Swiss Chard from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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