At its best:
Jun, Jul, Aug
Choose a large pot with good drainage holes, and add broken terracotta or 'crocks' to the bottom of it.
Fill the container with compost on top of the broken crocks. Use a free-draining, loam-based compost, such as John Innes No.3, with some extra grit mixed in.
Plant a single large agapanthus, or group several smaller ones together in a pot. Position the top of the roots about 5cm below the rim of the pot.
Fill around the roots with compost, firming it down to get rid of air pockets. Keep the 5cm gap at the top of the pot so that water can collect and won’t run off.
Water well to settle the compost, topping it up with more compost if needed. Add a decorative mulch to finish off the pot and help conserve moisture.
Agapanthus usually flower in June, July or August, depending on the variety. Very young plants may need a year to become established before they flower.
After flowering, cut away the old stems at their base to tidy up the display and prevent the plants wasting their energy by producing unwanted seeds.