GUIDE
Mixing compost for succulents
6 steps
How to do it
- 1Start from the principle, not a recipe: the mix has to let water through in seconds and hold almost nothing back. A succulent dies of a wet root, never of a hungry one.
- 2Aim for roughly half mineral grit and half organic material — sharp horticultural grit, perlite or pumice with a peat-free multipurpose or a loam-based John Innes No. 2. Half grit looks excessive in the bag and is about right in the pot.
- 3Use grit, not sand. Builder's sand and play sand have fine particles that fill the gaps and do the opposite of what you want.
- 4Top-dress with 1-2cm of gravel or grit. It keeps the crown and lower leaves off wet compost, which is where rot starts, and it stops the surface caking.
- 5Choose a pot wider than deep, in terracotta if you water generously and plastic if you forget — the clay does half the drying for you.
- 6Skip the water-retaining granules and the moisture-control composts entirely, however good they are for everything else.
COMMON MISTAKE
Planting a succulent in straight multipurpose compost. It looks fine for a season, then the plant sits in a sponge through the first wet winter and collapses at the neck.