Propagation Pots in Autumn: Clean and Ready for Storage

AI-generated illustrative image.

After the last round of propagation, empty pots and trays often end up in a corner. Autumn is a good time to turn them into an organised supply for next season. The most useful work comes before stacking: remove old compost, clean thoroughly and allow everything to dry completely.

1. Sort before washing

Separate pots, propagation trays and water-catching trays. Set aside items with brittle edges or cracks. Remove loose compost and old roots with a brush suitable for the material. Include the underside, rim and drainage holes of pots. The solid tray underneath, by contrast, is designed to catch water.

2. Clean inside and out

Wash empty containers in warm, soapy water, then rinse with clean water. Work carefully around corners and recesses without damaging the plastic. Cleaning products and methods must suit the material; follow the manufacturer's instructions.

3. Store dry for winter

Let every part dry completely before nesting containers together. Store them protected from the weather and fresh dirt. Keep matching parts together: this makes it easier to spot a missing tray or an insert that needs replacing in spring. Plastic construction alone does not establish that an item is frost-proof.

Clean does not mean pathogen-free

Compost and plant debris can carry plant pathogens. These can remain even on surfaces that look clean. Washing and drying therefore do not replace any necessary disinfection. Keep containers from diseased plants separate and seek appropriate advice on treatment before reusing them. Use only a product suitable for the purpose and material, following its label; do not make up your own mixtures.

Your next step: Check what you already have. If you need a compatible water-catching tray, see the STP tray and its product information.