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Calotropis procera

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Calotropis (kal-LOW-troh-pis) (Info)
Species: procera (PRO-ker-uh) (Info)

Synonym:Asclepias procera

One vendor has this plant for sale.

13 members have or want this plant for trade.

Tropicals and Tender Perennials

8-10 ft. (2.4-3 m)

4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Parts of plant are poisonous if ingested
All parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color:
Maroon (Purple-Brown)

Bloom Time:
Blooms all year


Other details:
May be a noxious weed or invasive

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
From woody stem cuttings

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds

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There are a total of 12 photos.
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6 positives
2 neutrals
No negatives

Gardeners' Notes:

Positive Alittlepatchofheaven On Jul 30, 2014, Alittlepatchofheaven from Port Saint Lucie, FL wrote:

I just ordered Calotropis Procera seeds (they came from Hawaii) and planted them. I soaked them for 24 hours and then planted them - barely misting the seeds daily. I already have two sprouts in just 4 days!

..... fyi...... this is not the same as Giant Milkweed

Neutral FlaFlower On Mar 4, 2013, FlaFlower from Miami Dade, FL (Zone 11) wrote:

Forever I have been in search of this plant, the California native and the Texas native Butterfly garden is waiting...

Positive artcons On May 4, 2007, artcons from Fort Lauderdale, FL (Zone 10b) wrote:

I first saw the plant at Fairchild Tropical Gardens. It was loaded with a variety of butterflies including Atala's. I was able to get cuttings of a plant while visiting a MG's garden. I placed one stem in water another with diluted rooting hormone (7 parts sand 1 part hormone) in dirt and a third with no hormone in dirt. The cuttings were all placed in the shade. After about two weeks all of them were sprouting new shoots.

Positive pianopete On Apr 14, 2007, pianopete from Palm Beach Gardens, FL (Zone 10a) wrote:

I have no problem propogating this plant here in Palm Beach Gardens FL. Whenever I trim it back, it tends to get large, I just put the removed stems in a plastic pot with sand or sometimes potting soil, and in a few weeks have a new plant growing. We raise monarchs and I remove leaves to feed them in their cages.... much better than the tropical scarlet milkweed leaves because these leaves are much larger and do not dry out as fast when removed from the plant. However, the monarchs do not lay eggs on the plants that are growing in the garden for some reason. They always prefer the scarlet milkweed for their eggs. Dunno why as I have seen monarchs on other folk giant milkweed plants.

Positive larcatz On Jul 11, 2006, larcatz from Ocoee, FL (Zone 9b) wrote:

Wow I just love this plant the pictures just don't do any justice to this beautiful bloom..... I've done a little research on this plant and also belive it to be Calotropis ginantea AKA: Crown Flower, Giant Milkweed

Positive foodiesleuth On Nov 16, 2004, foodiesleuth from Honomu, HI (Zone 11) wrote:

A friend and neighbor in our village has several Giant Milkweed in her yard. She has two types. One with the lavender blooms as seen in the pictures and also one with white blooms. There are usually lots of butterflies around them. My friend has been successful in propagating by rooting stems. I was told recently she had some rooted for me. Can't wait to get and plant them.

Positive kamia On Dec 1, 2003, kamia from Athens, TN (Zone 7a) wrote:

This is probably my favorite of the milkweeds. Full sun, moderate water, occasional pruning. I got mine at the nursery I work at. We only got in two in & I snatched it up right away because I had never seen one at the time. Right now mine is covered in monarch larvae. The bottom of my plants chewed beyond recognition - which is great. Aphids a serious problem at times but lady bugs tend to keep them in check and the aphid problem clears up within a few days. Right now it's sending up new shoots along the old ones. Once they grow up a bit I will be dividing it from the rest of the plant in order to start a few new ones.

Neutral planths70 On Nov 8, 2003, planths70 from Gray Court, SC wrote:

I was in Palmetto Florida last week - there was a 15 ft Giant Milkweed across the street in bloom with purple/lavender flowers. It is in full sun, in sandy soil, and is subjected to onshore and offshore winds from the Tera Ceia Bay. The homeowner said it is unusually large and attracts hundreds of butterflys. Propagation is apparently difficult, as they have only been able to get one successful start from it - they gave it to me in a large pot. It had scale on it, but the gardener said it was easily handled with a mixture of Murphy's Oil Soap and water sprayed on it. It will be intersting to see how it grows in a pot inside during the winter and outside during temperate weather. **I would like to know about standard propagation methods!


This plant has been said to grow in the following regions:

Phoenix, Arizona
Big Pine Key, Florida
Fort Lauderdale, Florida
Hollywood, Florida
Miami, Florida
Ocoee, Florida
Orlando, Florida
Port Saint Lucie, Florida
Ruskin, Florida
West Palm Beach, Florida
Honomu, Hawaii
Kihei, Hawaii

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