Spotlight Series Hollyhock
Alcea rosea 'Blacknight'
AL-see-uh ROH-zee-uh
Perennials: Grandma's Garden
Zone
3: -40° to -30°
Min. Temp
Hardy: 28°
Stately short-lived perennial. Plant hollyhocks at the back of the border or along fences and walls.
Appearance
Summer Foliage
Green
Fall Foliage
Green
Flower Color
Black
Blooming Time
Mid Summer - Fall
Habit
Upright
Height
4–6 ft
Spread
18–24 in
Form
Single
Characteristics
Type
Cultivar
Safety
Non-toxic
Growth Rate
Moderate
Tolerance/Resistance
Cold Hardy
Attracts
Attracts Hummingbirds; Attracts Honeybees & Pollinators; Attracts Butterflies
Uses/Placement
Cut Flower
Optimal Growing Conditions
Sun Exposure
Full Sun - Part Sun
Soil Texture
Adaptable
Soil Drainage
Well-drained
Soil Moisture
Dry
Soil PH
Neutral: 6.5-7.0
PH Tolerance
Prefers neutral soil
Soil Amendment(s)
Organic Matter Recommended
Fertilizer
Heavy Feeder
Fertilizer Formula
Balanced Fertilizer
Fertilizer Timing
Pre-Bloom
Micronutrients
Trace Minerals Beneficial
Care
Care Level
Moderate
Behavior and Propagation
Spreading
Moderate Spreader
Propagation Method
Benefits from Pollinators
Propagation Licensing
Trademarked cultivar
Division Timing
Do Not Divide