Overwintering

Why Pachypodium overwinters well

Pachypodium lamerei and P. succulentum are naturally deciduous in their native habitats — they drop their leaves during the dry season and enter a dormant state. In Zone 6, the shortening days and cooling temperatures of fall trigger exactly this response. The plant is not being forced into artificial dormancy — it is following its natural biological cycle, just managed for a northern climate.

A Pachypodium in true dormancy — bare of leaves, stored at 45–60°F, with minimal water — is remarkably resilient through a long northern winter. The problems arise when storage temperatures are too warm (the plant breaks dormancy prematurely in insufficient light), too cold (root damage), or when watering continues at growing-season rates (root rot in cold, wet media).

Fall preparation — August through October

Stop fertilizing by mid-August. Reduce watering frequency through September as temperatures drop. Bring plants inside before any night drops below 45°F — in Zone 6 this is typically mid-September for Pachypodium (earlier than Adenium or Plumeria due to the narrower cold tolerance margin).

Allow natural leaf drop to occur over the following weeks. Do not strip leaves. A plant that still holds some leaves in November can have water withheld completely — leaf drop will follow within 2–3 weeks.

Storage conditions

The target storage environment: 45–60°F, no light required for fully dormant deciduous specimens, minimal water. An unheated attached garage is the most common and typically ideal Zone 6 storage location. Verify the actual temperature range with a min-max thermometer before committing plants to a location — never assume.

Avoid storage locations warmer than 65°F — plants will break dormancy prematurely in insufficient light and produce pale, weak growth that is highly vulnerable. A spare bedroom is usually too warm. A basement with a furnace nearby can be too warm on the warm side of the temperature range.

Winter water management

Once monthly — at most. Pachypodium in cool dormancy storage processes almost zero water. The function of the monthly watering is solely to prevent complete root desiccation, not to maintain active moisture levels. If the media feels even slightly moist 2 inches down, do not water. The single greatest storage mistake is continuing summer watering frequency into cool storage conditions.

Spring reactivation

In April, move plants to a warmer location (above 60°F) and increase available light. Watch for tip swelling and the emergence of the first leaf growth — these signals confirm the root system is activating. Do not rush outdoor placement — wait until nighttime temperatures are consistently above 50°F. Transition to outdoor sun gradually over 7–10 days after any extended indoor period.

Resume normal watering only after active leaf growth is confirmed. Resume fertilization 2–3 weeks after active growth is well established. The root system needs time to fully reactivate before processing nutrients efficiently.