Antelope Horns
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Asclepias asperula
When fully grown, Asclepias asperula can reach up to 2 feet in height and has an upright, sprawling growth habit. The plant's stems are densely covered with tiny hairs and feature narrow, irregularly grouped leaves 4-8 inches long. The large, thick, narrow leaves often fold lengthwise, resembling the horns of an antelope, hence the plant's vernacular name "antelope horn."
The caterpillars of Monarch butterfly species feed on milkweed plants, including the antelope horn.
Antelope horn plants produce attractive, robust flower heads, and their common name is derived from the curved shape of the seed pods. It is common for aphids to be found on antelope horn plants. Although only a problem if the plant appears unhealthy, aphids can be effectively managed by spraying the plant and aphids with soapy water or high-pressure water while supporting the plant with your hand.
In addition to being toxic to animals, including humans, like many others in the genus Asclepias, this plant contains harmful substances. Some people may be sensitive to the sap of these plants, and a person's sensitivity to the toxin can depend on factors such as age, weight, health condition, and susceptibility. Children are the most vulnerable due to their curious nature and small size. A plant's toxicity can vary depending on the season, parts, and growth stage. Furthermore, plants can absorb toxic substances from the air, water, and soil, such as herbicides, pesticides, and pollutants.
Nectar Source Plant: Black Swallowtail (Papilio polyxenes), Common Checkered Skipper (Pyrgus communis), Giant Swallowtail ( Papilio cresphontes), Large Wood Nymph (Cercyonis pegala), Mourning Cloak ( Nymphalis antiopa), Queen (Danaus gilippus), Question Mark (Polygonia interrogationis), Red Admiral (Vanessa atalanta), Tiger Swallowtail ( Papilio glaucus)
BONAP MAP
Height: 1’-2'
Spread 2’-3’
Bloom: March-October
Light: Full Sun
Water: Low, Medium
Zone: 5, 6, 7, 8, 9
Origin: Texas
Deer Resistant: Yes
Winter Shipping: We will continue to ship throughout winter. If you prefer, we are happy to hold your order until spring; please include that request in your shipping notes.
When you order plants from our nursery, you can expect them to arrive in the best possible condition. Our team carefully packs each order using sturdy, biodegradable packaging materials.
Your plants' appearance may vary depending on the season and their current growth stage. We may cut back the leafy growth of some plants to prepare them for shipment and transplanting.
5 Gallon and Up: Any plant purchased to ship over 5 Gallons will be shipped bare root. This means we will remove the plant from its original pot, remove the soil surrounding the roots, and wrap the roots with a biodegradable plastic bag. This reduces weight and the likelihood of damage during shipping.
Once your plants arrive, it is essential to plant them as soon as possible. This will help them rebound and thrive. If you cannot plant immediately, water regularly and keep the roots off heat-conducting surfaces.
Newly transplanted plants often require more water until their roots are well established. Plan to water them 1-3 times weekly for the first few months.
