Asclepias albicans is a species of milkweed known by the common names whitestem milkweed and wax milkweed. It is native to the Mojave and Sonoran Deserts of California, Arizona, and Baja California. This is a spindly erect shrub usually growing 1 to 3 meters (3+1⁄2 to 10 feet) tall, but known to approach 4 meters. The sticklike branches are mostly naked, the younger ones coated in a waxy residue and a thin layer of woolly hairs. The leaves are ephemeral, growing in whorls of three on the lower branches and falling off after a short time. They are linear in shape and up to 3 centimeters (1+1⁄4 inches) long. The inflorescence is an umbel about 5 cm (2 in) wide which appears at the tips of the long branches and sprouting from the sides at nodes. The inflorescence contains many purple-tinted greenish flowers, each about 1.5 cm (1⁄2 in) wide, with a central array of bulbous hoods, and corollas reflexed back against the stalk. The plant usually blooms from March to May. The fruit is a large, long, thick follicle which dangles in bunches from the branch nodes. Asclepias albicans is a larval host for the monarch butterfly. The similar A. subulata is found in similar regions.
Whitestem milkweed has moderate resistance to disease but is more sensitive to high humidity and excessive watering. It becomes more prone to illness if it does not receive enough light and is kept too wet. Regarding care, Whitestem milkweed is drought-tolerant and can endure extended periods without water. It requires little fertilizer and only occasional pruning. Because of these traits, it is appropriate for gardeners of any skill level, particularly those who prefer to spend less time on plant care and who might occasionally be away from home for extended periods. It is a suitable option for people who do not want to dedicate a lot of time to maintenance but still want an easy-to-care-for plant.
How to keep Asclepias Albicans.
Light
Native to arid regions, Whitestem milkweed does best in full sun, its natural habitat featuring strong sunlight and minimal shade. It will also tolerate partial sun, giving it some flexibility in growth.
Water
Whitestem milkweed only needs watering when the soil becomes dry. During dry fall and winter months, misting the plant can help maintain humidity, which promotes healthier growth.
Temperature
Whitestem milkweed does well in warm conditions and needs higher temperatures during the growing season to encourage growth and metabolic activity. It prefers plenty of sunlight, appropriate moisture, and good air circulation. However, it can be harmed by excessively low temperatures and by overwatering. It is also important to maintain balance and avoid overly high temperatures and very dry conditions.
Fertilizer
For Whitestem milkweed, light applications of fertilizer once or twice a year during the growing season are adequate. Do not fertilize in winter or in summer when the plant is dormant. Cut back on fertilizer for plants that have been repotted, and wait a couple of months after repotting before applying any fertilizer. Fertilizing helps maintain healthy growth and promotes blooming.
Pruning
Whitestem milkweed has smooth, whitish stems and thrives when pruned in early spring. This practice removes dead stems and promotes new growth. To encourage new shoots, make your cuts just above a node, and be careful not to prune too heavily to avoid stressing the plant. Regular pruning helps improve air circulation and prevent diseases. However, handle the plant carefully, as it contains toxic sap.
Botanical profile.
- Plant Type
- Shrub, Succulent
- Life Cycle
- Perennial
- Genus
- Asclepias
- Family
- Apocynaceae
- Hardiness Zone
- 9-11
- Mature Height
- 2.13 m to 3.05 m
- Mature Spread
- 49 cm to 91 cm
- Leaf Color
- Ghost White
- Leaf Type
- Deciduous
- Flower Color
- White
- Flower Size
- 0.51 cm to 0.76 cm
- Bloom Time
- Spring, Early summer
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- Summer, Early fall
- Native Area
- Mexico
Other names.
Reader questions.
What are the sunlight requirements for Whitestem milkweed?
Whitestem milkweed, known botanically as Asclepias albicans, thrives in conditions where it can receive ample sunlight. It requires full sun, which means it needs more than 6 hours of sunlight daily, but it can also grow in partial sun, receiving about 3-6 hours of sunlight. It's important to observe the movement of sunlight through your garden to choose spots that offer the right balance of light and shade. This consideration will ensure your plants grow happily and healthily.
