General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9a
Plant Height: 5-6 feet
Plant Spread: 2-3 feet
Flowers: Showy
Flower Color: Purple
Bloom Size: 4"-5"
Flower Time: Late spring or early summer
Late summer or early fall
Wildlife Attractant: Bees
Resistances: Deer Resistant
Drought tolerant
Propagation: Seeds: Provide light
Sow in situ
Start indoors
Other info: Outdoors, will self-seed. Indoors, provide light. Sow in 2" pots, lightly cover with potting mix. Kept at 70-75° F., germination is in 14-28 days. Can direct sow into prepared seed beds in groups of 3-4 seeds, 2-3 ft. apart. Thin to strongest plant.
Containers: Not suitable for containers
Miscellaneous: Tolerates poor soil

Trade name information:
Series: Spotlight™
Trade Name: Blacknight
Cultivar name: 'Blacknight'
Common names
  • Hollyhock

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