Overview
Spruce Bonsai (Picea species) is a evergreen conifer with short needles, layered branches and mountain-tree character. It is best suited to formal upright, forest, literati, windswept and alpine styles. For UK growers, treat it as: Outdoor only.
Placement
full sun to light shade, with protection from extreme heat
Watering
keep evenly moist but well drained; spruce dislikes prolonged drought
Feeding and fertilising
feed moderately in spring and early summer
Pruning and wiring
pinch or cut new growth carefully; back-budding is limited on bare old wood
Repotting
repot every 3-5 years in early spring
Propagation
seed, cuttings for some species and nursery material
Pests, diseases and common issues
spider mites, aphids, needle cast, heat stress and inner dieback from shade