Edible plant · Growing guide
Collard Greens
Brassica oleracea var. viridis · Brassica family
Collard Greens is an upright edible plant grown for leafy green, fall harvest, and fresh greens. Use this guide to match its light, water, soil, space, seasonal care, and safety needs.
- Reliable light
- Full sun
- Water pattern
- Consistent
- Mature size
- 30 × 24 in
- Final spacing
- 20 in
- Season
- cool
Plant identity, types & settings
One plant guide. Clear details underneath.
Collard Greens is the plant identity. Container, landscape, cutting, indoor, hydroponic, and harvest labels describe ways to grow it; they are not additional plant or cultivar names.
Ways to grow it
These are garden or production settings—not cultivar names and not extra plants.
Baby Leaf
Sow densely only for an early baby-leaf cut and maintain airflow.
- Mature size
- 9 × 10 in
- Spacing
- 5 in
- Container
- 5+ gal · 10+ in deep
Cut And Come Again
Keep the crown intact and retire plants when quality or sanitation declines.
- Mature size
- 15 × 13 in
- Spacing
- 11 in
- Container
- 8+ gal · 10+ in deep
Full Size Head Or Bunch
Thin to the full mature spacing rather than seedling spacing.
- Mature size
- 19 × 14 in
- Spacing
- 14 in
- Container
- 10+ gal · 10+ in deep
Indoor Hydroponic
Use a food-safe reservoir, uniform grow light, and crop-specific nutrient label.
- Mature size
- 15 × 11 in
- Spacing
- 8 in
- Container
- 6+ gal · 10+ in deep
01 · Light & site
Give it the light its growth depends on.
Full sun, with roughly 6 to 8 hours of useful light. Cool spring or fall conditions
02 · Water & soil
Keep roots supplied without trapping water.
Keep the active root zone evenly moist while preserving drainage.
- Soil
- Loose, organic garden soil
- Drainage
- Moist but drained
- pH
- Species-dependent, commonly mildly acidic to neutral
03 · Spacing & roots
Make room for the mature plant.
Space plants about 20 inches apart. Expect a mature plant around 30 inches tall by 24 inches wide.
A branching root system needs the stated depth plus aerated soil around the mature spread.
04 · Start
Begin with the method that protects establishment.
Direct sow or transplant according to crop-specific temperature and root-disturbance guidance.
05 · Care
Support healthy growth through the season.
Usually self-supporting at the stated mature size. Add a discreet stake only if wind, bloom weight, or an exposed site makes it necessary.
- Upkeep
- Moderate
- Feeding
- High
- Watch for
- Cabbageworms, Flea beetles, Aphids
06 · Flower or harvest
Harvest and maturity
55 to 85 days. Use the seed packet or plant label for cultivar-specific timing and harvest cues, then adjust for temperature, light, and the stage you intend to pick.
07 · Safety
Know the cautions before you place or use it.
- Confirm cultivar, regional timing, and toxicity or food-use details with local extension guidance.
- Keep unknown plant parts away from children and pets.
08 · Sources
Check the evidence behind the guide.
Guide record: July 20, 2026. Region, cultivar, regulations, and current product labels can change the right decision.
Working checklist