Varieties
Pachypodum densiflorum
Origin
Native to southern, central and northern Madagascar.
General Care
Light
Very bright light with some direct sun. Tolerates full sun if acclimated gradually. Avoid low light, which leads to weak growth and poor flowering.
Temperature
18–30°C (spring–fall). Give a rest at 12-15°C (winter), but maintain bright light condition. Prefers cooler, dry conditions in winter. Protect from frost and cold drafts.
Humidity
Low to average. Well adapted to dry air; excess humidity is unnecessary.
Water
Spring–fall: every 1–2 weeks, water thoroughly and let mix dry fully.
Winter: every 2–3 weeks, water sparingly and allow barely moist potting mix to dry completely. Sensitive to overwatering, and susceptible to caudex rot. Always check moisture level before watering. Aerate mix to improve its condition.
Fertilizer
Monthly (spring–summer). Use diluted cactus or succulent fertilizer, according to packaging instructions. Do not fertilize during winter dormancy.
Maintenance
Every 1-2 weeks, rotate plant to ensure even growth. Every 1-2 months, dust foliage and caudex with a soft, dry paintbrush/shaving brush and inspect for pests, when doing so.
Potting and Repotting
Use a fast-draining cactus or succulent mix amended with coarse sand or pumice. Repot sparingly, only when root-bound (spring). Choose a heavy, stable pot to support the broad caudex. Top dress with fresh mix if repotting is not required. Choose a shallow, wide container to accommodate its caudex. Top dress annually, once maximum convenient planter size reached.
Special Points/Common Problems:
- Naturally a slow grower; patience is required.
- Seasonally dormant in winter; leaf drop is normal.
- Produces clusters of bright yellow flowers on mature plants during the growing season.
- Caudex health is critical: wrinkling = thirsty; softening or blackening = rot.
- Avoid excess handling and handle with care, as plant contains toxic, milky latex sap. Keep away from children and pets.
- Pests: mealybugs and scale often hide in bark crevices, along stems and leaf undersides — inspect regularly.