If you’re growing a tree or shrub in a large container, you should replenish the compost every year or two. The ideal time to do this is between February and May.
Doing so will improve the compost structure and provide a fresh supply of nutrients, which can be lost quickly in pots and containers.
If you want to grow more plants in pots and containers, but aren’t sure what to grow, have a look at our top 10 plants for containers.
Discover how to refresh compost in pots, below.
You Will Need
- Hand fork
- Multi-purpose, peat-free compost
- Gravel or pebbles
Gently loosen the compost from among the surface roots with a hand fork, working right out to the edge of the pot. Then remove as much old compost as possible.
Top it back up with a 50:50 mix of loam-based potting compost and organic-based multi-purpose compost. Firm down as you go and avoid air pockets among the roots.
Water in thoroughly, then add a thick layer of gravel or pebbles on top. This weighs down the fresh compost, deters weeds, and holds moisture around the roots.