How to Grow Green Antelope Horn

Green Antelope Horn image by theroadhere/


Green antelope horn is a perennial herb that grows to be between 12 and 24 inches tall. It's the asperula species, which is part of the Asclepiadaceae family. The flowers are pale green or white in color and bloom between late spring and early fall, from April to September. The flowers are arranged in clusters and are tolerant to cold and heat.

Step 1

Choose a planting site that is in full sun. Green antelope horn grows well in rich or poor soils, so there's no need to worry about soil quality.

Step 2

Plant green antelope horn in the fall. Dig holes with the tip of a shovel or with your fingertip. Make them about an inch deep. Space them 12 to 15 inches apart.

Step 3

Place a seed in each hole. Cover with soil and pack it down, then water.

Step 4

Keep the soil consistently moist. Check it often with your finger. If it feels like it's drying out, add more water. People who live in drier climates should water it every other day. Don't let the soil dry out between waterings.

Step 5

Expect the plant to grow the following spring in an open, spreading form. For a blanket effect, plant green antelope horn close together.

Tips and Warnings

  • Green antelope horn may be a noxious weed or invasive. Parts of green antelope horn are poisonous if ingested. It may be poisonous to cattle.

Things You'll Need

  • Shovel
  • Seeds
  • Soil


  • The University of Texas at Austin
  • Dave's Garden
Keywords: Green Antelope Horn, Asclepiadaceae, perennial

About this Author

Based in New York State, Kelly Shetsky started writing in 1999. She is a broadcast journalist-turned Director of Marketing and Public Relations and has experience researching, writing, producing and reporting. She writes for several websites, specializing in gardening, medical, health and fitness, entertainment and travel. Shetsky has a Bachelor of Arts in communications from Marist College.

Photo by: theroadhere/