Notes
Long-day yellow storage. Hard, 8–10 month. 4-row 4 in.
Cultivars / Alliums
Copra
Onion · Allium cepa
DTM
105 d
126 d occupancy · hardy
Rows
4
4 in in-row
Density
12
plants / bed-ft
Yield
5
lb / bed-ft
Direct $/ft
$11.50
$2.50 / lb
Propagation
- Method
- Transplant
- Cell size
- 128s
- Nursery lead
- 70 d
- Germination
- 8 d
- Germ temp
- 50°F – 80°F (opt 68°F)
- Seed spacing
- 1 in
Field geometry · 30 in
- Bed width
- 30 in
- Rows / bed
- 4
- In-row
- 4 in
- Seed spacing
- 1 in
- Plants / linear ft
- 12
- Plants / 50 ft
- 600
Timeline
- DTM from field
- 105 d
- Holding
- 21 d
- Occupancy
- 126 d
- Multicut
- no
- Fall photoperiod
- ×1
- Frost hardiness
- Hardy
Yield & revenue
- Sales unit
- lb
- Units / bed-ft
- 5
- Avg unit wt
- 1 lb
- Target lb / bed-ft
- 5 lb
- Cull rate
- 8%
- Wholesale / Direct
- $1.35 / $2.50
Irrigation
- Drip lines / bed
- 2
- Emitter spacing
- 8 in
- Emitter GPH
- 0.42
- Weekly water
- 1 in
- GPH / 50 ft
- 63
- Gal / week · 50 ft
- 77.9
Soil extraction
- Fertility demand
- Moderate
- N / 100 bed-ft
- 1.5 lb
- P / 100 bed-ft
- 0.55 lb
- K / 100 bed-ft
- 2.4 lb
- N-P-K / 50 ft
- 0.8 / 0.3 / 1.2 lb
- Family
- Amaryllidaceae
On this farm · 50 ft block
- Season window
- 2026-03-04 → 2026-11-10
- First greenhouse
- 2025-12-24
- First harvest
- 2026-06-17
- Successions that fit
- 1 · every — d
- Bed-ft for 50 lb
- 11 ft
- Seed for 50 ft
- 706 seeds · 600 plants
- Wholesale / Direct · 50 ft
- $310.50 / $575.00
Companions
carrot · beet · lettuce · kale
Avoid
pea · bean