Notes
Workhorse curly kale for winter. Survives 10°F with row cover. Two rows on 30-inch bed. Harvest from the bottom up through March in zone 8.
Cultivars / Brassicas
Winterbor
Kale · Brassica oleracea var. sabellica
DTM
60 d
165 d occupancy · extreme
Rows
2
12 in in-row
Density
2
plants / bed-ft
Yield
1.5
bunches / bed-ft
Direct $/ft
$6.28
$4.50 / bunch
Propagation
- Method
- Transplant
- Cell size
- 128s
- Nursery lead
- 32 d
- Germination
- 6 d
- Germ temp
- 40°F – 80°F (opt 68°F)
- Seed spacing
- 2 in
Field geometry · 30 in
- Bed width
- 30 in
- Rows / bed
- 2
- In-row
- 12 in
- Seed spacing
- 2 in
- Plants / linear ft
- 2
- Plants / 50 ft
- 100
Timeline
- DTM from field
- 60 d
- Holding
- 21 d
- Occupancy
- 165 d
- Multicut
- yes · 8 cuts · 12 d
- Fall photoperiod
- ×1.05
- Frost hardiness
- Extreme
Yield & revenue
- Sales unit
- bunch
- Units / bed-ft
- 1.5
- Avg unit wt
- 0.8 lb
- Target lb / bed-ft
- 2.8 lb
- Cull rate
- 7%
- Wholesale / Direct
- $2.50 / $4.50
Irrigation
- Drip lines / bed
- 1
- Emitter spacing
- 12 in
- Emitter GPH
- 0.5
- Weekly water
- 1 in
- GPH / 50 ft
- 25
- Gal / week · 50 ft
- 77.9
Soil extraction
- Fertility demand
- Heavy
- N / 100 bed-ft
- 2.2 lb
- P / 100 bed-ft
- 0.5 lb
- K / 100 bed-ft
- 2.1 lb
- N-P-K / 50 ft
- 1.1 / 0.3 / 1.1 lb
- Family
- Brassicaceae
On this farm · 50 ft block
- Season window
- 2026-02-18 → 2026-11-24
- First greenhouse
- 2026-01-17
- First harvest
- 2026-04-19
- Successions that fit
- 2 · every 30 d
- Bed-ft for 50 lb
- 20 ft
- Seed for 50 ft
- 118 seeds · 100 plants
- Wholesale / Direct · 50 ft
- $174.38 / $313.88
Companions
onion · beet
Avoid
tomato