Notes
Upright romaine for wholesale hearts. Tipburn risk with uneven irrigation. Keep even moisture; harvest at dawn.
Cultivars / Leafy greens
Green Forest Romaine
Lettuce · Lactuca sativa var. longifolia
DTM
58 d
70 d occupancy · hardy
Rows
3
8 in in-row
Density
4.5
plants / bed-ft
Yield
4.5
heads / bed-ft
Direct $/ft
$11.14
$2.75 / head
Propagation
- Method
- Transplant
- Cell size
- 128s
- Nursery lead
- 28 d
- Germination
- 5 d
- Germ temp
- 40°F – 80°F (opt 68°F)
- Seed spacing
- ½ in
Field geometry · 30 in
- Bed width
- 30 in
- Rows / bed
- 3
- In-row
- 8 in
- Seed spacing
- ½ in
- Plants / linear ft
- 4.5
- Plants / 50 ft
- 225
Timeline
- DTM from field
- 58 d
- Holding
- 12 d
- Occupancy
- 70 d
- Multicut
- no
- Fall photoperiod
- ×1.2
- Frost hardiness
- Hardy
Yield & revenue
- Sales unit
- head
- Units / bed-ft
- 4.5
- Avg unit wt
- 0.9 lb
- Target lb / bed-ft
- 3.8 lb
- Cull rate
- 10%
- Wholesale / Direct
- $1.60 / $2.75
Irrigation
- Drip lines / bed
- 2
- Emitter spacing
- 8 in
- Emitter GPH
- 0.42
- Weekly water
- 1.1 in
- GPH / 50 ft
- 63
- Gal / week · 50 ft
- 85.7
Soil extraction
- Fertility demand
- Heavy
- N / 100 bed-ft
- 1.8 lb
- P / 100 bed-ft
- 0.4 lb
- K / 100 bed-ft
- 1.9 lb
- N-P-K / 50 ft
- 0.9 / 0.2 / 1 lb
- Family
- Asteraceae
On this farm · 50 ft block
- Season window
- 2026-03-04 → 2026-11-10
- First greenhouse
- 2026-02-04
- First harvest
- 2026-05-01
- Successions that fit
- 8 · every 10 d
- Bed-ft for 50 lb
- 15 ft
- Seed for 50 ft
- 265 seeds · 225 plants
- Wholesale / Direct · 50 ft
- $324.00 / $556.88
Companions
carrot · onion · radish
Avoid
broccoli