Why Jade Plants Need Drainage Holes and How to Fix Moldy Soil

A jade plant in a pot without drainage holes developed surface mold. The owner asks if the lack of holes causes problems.

The Purpose of Drain Holes

Drain holes let excess water escape. Without them, water pools at the bottom, wicks upward, and rots roots – often fatally before symptoms appear.

Mold Indicates Improper Drying

Mold needs constant surface moisture. Jade plants need the top quarter of soil to become bone dry between waterings. Mold means soil stays too wet – either from trapped water or overwatering.

Solutions

1. Repot into a container with drainage holes.
2. Use gritty, fast-draining soil (cactus/succulent mix).
3. Water only when top quarter of soil is completely dry.
4. Remove moldy surface soil and replace with fresh dry mix.

Theoretically, precise watering could work without holes, but it's risky and unnecessary.