Overview
Azalea Bonsai (Rhododendron species, especially Satsuki azalea) is a flowering evergreen shrub famous for spring and early summer blossom and naturally small leaves. It is best suited to flowering displays, broom, informal upright and multi-trunk styles. For UK growers, treat it as: Outdoor, with winter protection for the roots.
Placement
bright outdoor light with protection from the strongest midday sun and drying wind
Watering
keep consistently moist; use rainwater where possible because azaleas dislike lime
Feeding and fertilising
feed after flowering and through the growing season with acid-loving plant feed
Pruning and wiring
prune after flowering, removing spent flowers and shaping new growth; wire with care as branches can be brittle
Repotting
repot every 2-3 years after flowering into acidic bonsai soil such as kanuma-based mix
Propagation
cuttings and layering are commonly used
Pests, diseases and common issues
dry roots, lime-induced chlorosis, vine weevil, lacebug and flower bud loss from drought