The standard and dwarf Barbados cherry (Malpighia emarginata) trees have been flowering for a few months. We experienced flower drop during the hottest and driest times of the year. Both varieties enjoy the high humidity by becoming more productive, and a few sweet, tart fruits are ripening.
How to reduce flower drop
- Plant the trees in semi-shade locations to protect them from the hot summer heat.
- The sheltered locations will reduce flower drop during windy winter months.
- Keep the soils moist by watering them once a week—twice or three times for potted plants. The soil should be moist but not wet.
- Add compost and mulch during the dry months to improve moisture retention and nutrient content by improving the soil structure.
How to make them sweeter
- Reduce drought stress by ensuring the soil does not dry out for long periods.
- Allow two to three years for the plant roots to grow and adjust after transplants.
- Ensure soil pH is slightly acidic, especially in Lusaka, where limestone in the soils and water makes the soils too alkaline. This may reduce the nutrient availability to the plant even after adding compost or fertilizers.