Sierra Blanca Onion
Allium cepa
AL-ee-um SEE-puh
Edibles: Bulb
Min. Temp
Hardy: 28°
Big, mild white onions.
Widely adapted, day-neutral, and matures well anywhere in North America from spring sowing. Suitable for fall planting where short-day onions are normally grown. Produces uniform, large, white-skinned onions with mild flavor and thick rings. Not for long storage.
Appearance
Summer Foliage
Green
Fall Foliage
Green
Blooming Time
Late Spring - Late Spring
Habit
Upright
Height
10–12 in
Spread
Under 6 in
Form
Bulb
Characteristics
Type
Hybrid
Safety
Edible Parts
Growth Rate
Moderate
Traits
Pest Control
Tolerance/Resistance
Cold Hardy
Attracts
Attracts Beneficial Insects
Uses/Placement
Culinary
Optimal Growing Conditions
Sun Exposure
Full Sun: 8-12 hrs
Soil Texture
Loamy
Soil Drainage
Well-drained
Soil Moisture
Average
Soil PH
Neutral: 6.5-7.0
PH Tolerance
Prefers slightly acidic soil
PH Correction
High pH can reduce nutrient uptake
Soil Amendment(s)
Compost
Fertilizer
Heavy Feeder
Fertilizer Formula
Rooting & Blooming
Fertilizer Timing
Pre-Fruiting
Micronutrients
Sulfur (S)
Care
Care Level
Low
Behavior and Propagation
Spreading
Moderate Spreader
Propagation Method
Wind Pollinated
Propagation Licensing
Open propagation permitted
Division Timing
Do Not Divide
Fruit and Pollination
Days to Harvest
105 Days
Fruit Size
Large
Fruit Characteristics
Mild
Ploidy
Diploid
Pollination Method
Insect Pollinated