Collard Stat Summary
Plant Spacing: 12-18" (304-457 mm)
Row Spacing: 18-30" (457-762 mm)
Planting Depth: 1/4-1/2" (6-12 mm)
Plants Per Person: 4
Soil Temperature: 55-75°F (13-24°C)
Days to Emergence: 4-7
Recommended Soil PH: 6.0-7.5
Seed Indoors: 8 weeks before transplanting
Earliest Outdoor Planting: After Last Frost
Can direct seed outdoors
Can seed indoors
Prefers well-drained, fertile soil high in organic matter, pH 6.0 to 7.5. Direct seed about three months before expected fall frost. Plant seeds 1/4 to 1/2 inch deep, 1 inch apart in rows 18 to 30 inches apart. When seedlings established, thin to 12 to 18 inch spacings. For spring crops, start plants inside about 8 weeks before the last frost, and transplant when they are about 6 weeks old. Set transplants 12 inches apart, rows 18 to 24 inches apart.
Maintain ample, consistent soil moisture during hot periods in the summer.
Harvesting and Storing Collard
Harvest the smooth, firm individual leaves from the bottom of the stalk; the top of the stalk will continue to produce more greens. For best flavor and texture, pick leaves when they are about the size of your hand. Collard will stay fresh for 4 to 5 days in the refrigerator; wrap unwashed leaves in moist paper towels and place in sealed plastic bag.
Collard Insect and Disease Information
Cabbage worms are small green larva of the cabbage white butterfly. You can use row covers to keep them from eating small plants; hand pick and destroy on older plants. Aphids can be periodically sprayed off with a stream of water. Keeping the soil pH at or above 7.2 will help suppress club-root; if needed, adding lime will raise your soil pH.
Collard Yield Information
Frost and cool temperatures increase the flavor of collards; fall is the preferred time to grow this crop.
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