Choose your container’s location before you fill it.
Start with a layer of crocks to improve drainage, then fill your pot with fresh compost.
To improve moisture retention, use a soil-based John Innes compost (No2 or No3) mixed with an equal amount of mutli-purpose compost and add some slow-release fertiliser.
Tease out the roots before planting, to encourage good root development.
Leave a gap of 4-5cm between the compost and the container rim.
Check the compost regularly, and water if it feels dry.
Always water the compost, not the leaves, so the water reaches the roots.