Madagascar Palm Care: Growing This Unusual Succulent

Madagascar palm (Pachypodium lamerei) is not a palm at all. Despite its common name and its unmistakably palm-like silhouette — a spiny, swollen trunk topped with a rosette of strap-like leaves — Madagascar palm is a succulent in the family Apocynaceae, more closely related to plumeria and oleander than to any true palm. Its palm-like appearance is a case of convergent evolution: the columnar succulent growth form in Madagascar’s dry, seasonal climate produced a plant that looks strikingly similar to a palm without being botanically related to one.

This distinction matters practically because its care requirements follow succulent logic, not palm logic.

Light

Madagascar palm requires maximum light. As a plant native to the full sun of the dry spiny forests of southern Madagascar, it needs direct sun for most of the day to maintain compact growth and prevent the etiolated, weak growth that low-light conditions cause.

Outdoors: Full sun. USDA zones 9b to 11. Bring indoors before frost; temperatures below 32 degrees F damage or kill the plant.

Indoors: The sunniest possible window, ideally a south-facing exposure with unobstructed direct sun for most of the day. Supplemental grow lighting is valuable in low-light climates or north-facing rooms. A Madagascar palm that is not receiving adequate light loses leaves, becomes pale, and stretches toward the light source.

Watering

Water generously in summer when the plant is in active growth, allowing the top half of the potting mix to dry before the next watering. In winter dormancy, when the plant drops its leaves, reduce watering significantly. A dormant Madagascar palm in a cool room needs only a light watering once per month to prevent the roots from desiccating completely.

The most common care error is continuing to water at the summer rate through winter dormancy. This causes root rot in the dormant succulent root system, which is functionally similar to overwatering a cactus in winter.

Soil and Potting

Use a fast-draining cactus and succulent mix. Adding 30 to 50 percent coarse perlite or pumice to standard cactus mix improves drainage further for the best results. The container must have drainage holes; standing water in a saucer kills the root system.

Repot every two to three years in spring as the plant exits dormancy. The root system is not extensive relative to the trunk size; move up only one pot size at a time.

Spines

The trunk and branches of Pachypodium lamerei are densely covered with sharp spines arranged in clusters. These spines are a defense adaptation from the plant’s native habitat. Wear thick gloves for any handling. When repotting, wrap the trunk in several layers of newspaper or bubble wrap to protect your hands and arms.

Dormancy and Leaf Drop

Madagascar palm drops most or all of its leaves in fall as temperatures cool and day length shortens. This is normal and does not indicate a problem. New leaves emerge from the growing tip in spring. A Madagascar palm that is kept very warm and well-lit through winter with continued watering may retain some leaves, but the natural dormancy cycle is healthy.