General Plant Information (Edit)
Plant Habit: Shrub
Sun Requirements: Full Sun
Minimum cold hardiness: Zone 10a -1.1 °C (30 °F) to +1.7 °C (35 °F)
Plant Height: 6 to 16 feet (2-5m)
Leaves: Evergreen
Fruit: Showy
Flowers: Showy
Flower Time: Other: Nearly year round.
Suitable Locations: Xeriscapic
Wildlife Attractant: Butterflies
Resistances: Salt tolerant
Toxicity: Other: Milky sap is toxic
Propagation: Other methods: Cuttings: Stem
Layering
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots

Image
Common names
  • Giant Milkweed
  • Crown Flower
  • Giant Calotrope
  • Swallow-Wort
  • Madar
  • Bowstring of India
Botanical names
  • Accepted: Calotropis gigantea
  • Synonym: Asclepias gigantea

Photo Gallery
Location: Parchur, Andhra Pradesh, India
Date: 2024-01-30
Location: Parchur, Andhra Pradesh, India
Date: 2024-01-30
Location: Kwajalein Marshall Islands
Date: 2000
Location: Tampa FL
Date: 2018-12-08
Location: Tampa FL
Date: 2018-12-08
Location: Sri Lanka
Date: 2019-02-10
Location: Orlando Florida
Date: 2011-11-03
Calotropis gigantea - Giant Milkweed
Location: Lutz, FL
Date: 2014-02-02
Location: Sebastian, Florida
Date: 2013-06-01
Close-up of Giant Milkweed bloom and bud.
Location: Lutz, FL
Date: 2015-03-18
Location: United States Botanical Gardens, Washington DC
Date: 2017-05-20
Crown Flower 002
Location: Orlando Florida
Date: 2011-10-18
Calotropis gigantea - Giant Milkweed
Location: Lutz, FL
Date: 2014-02-02
A little over 6 feet tall.  That's butterfly pea growing up the s
Location: Sebastian, Florida
Date: 2013-06-17
Giant Milkweed has large leaves and grows in a bush form. It is a
Location: United States Botanical Gardens, Washington DC
Date: 2017-05-20
Crown Flower 001
Location: Balboa Park, San Diego, California         
Date: 2013-08-16
Location: Balboa Park, San Diego, California       
Date: 2013-08-16
Location: Kenya, Shimba Hills
Date: 11 January 2020
Not sure if it is a milkwood species
Location: Kenya, Shimba Hills
Date: 11 January 2020
Not sure if it is a milkwood species
Location: Grand Turk Island, Turks & Caicos
Date: June 2013
Location: My yard
Date: 2012-07-21
Location: My yard
Date: 2012-07-12
Location: Lutz, FL
Date: 2015-10-05
Location: Balboa Park, San Diego, California        
Date: 2013-08-16
Location: Balboa Park, San Diego, California      
Date: 2013-08-16
Discussion Threads about this plant
Thread Title Last Reply Replies
Giant Milkweed... by wcgypsy Jun 17, 2013 9:12 PM 1

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