General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 5b -26.1 °C (-15 °F) to -23.3 °C (-10 °F)
Plant Height: 12 - 15 inches
Plant Spread: 12 - 15 inches
Leaves: Deciduous
Flowers: Showy
Flower Color: Green
White
Bloom Size: 1"-2"
Flower Time: Late spring or early summer
Summer
Underground structures: Taproot
Uses: Cut Flower
Wildlife Attractant: Bees
Other Beneficial Insects
Propagation: Seeds: Self fertile
Propagation: Other methods: Division
Pollinators: Beetles
Various insects
Awards and Recognitions: Other: RHS Plants for Pollinators

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Common names
  • Masterwort
  • Greater Masterwort

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Location: Zone 5b, Chicago suburbs
Date: June 2021
Location: East garden
Date: June 2015
Location: Vaughan, ON, Canada (Zone 5b)
Date: 2014-07-26
Location: East garden
Date: 2014-08-04
Location: Manitoba, Canada
Date: 2020-07-24
Location: Vaughan, ON, Canada (Zone 5b)
Date: 2012-06-23
Location: Manitoba, Canada
Date: 2015-07-20
Location: Cowell's garden centre, Newcastle UK
Date: 2020-05-27
Location: Cowells Garden Centre Northumberland UK
Date: 2020-05-20
Astrantia major Star of Billion
Location: East garden
Date: June 2015
Location: East garden
Date: August 2015
Location: Cowell's garden centre, Newcastle UK
Date: 2020-05-27
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lovesblooms On February 24, 2018 Seeds sown
winter sown
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