Genista tinctoria – Dyer’s Greenwood (central Europe)
Habit: Small shrub, 0.3-0.8 m tall and wide, occasionally larger, upright-bushy, somewhat squat, green twigs without thorns, medium to fast-growing.
Flowers: Inflorescences like panicles with numerous yellow butterfly flowers, from June to August (September), persistent; one of the few indigenous summer flowering plants.
Leaves: Small, simple, lanceolate-elliptical, medium to dark-green, no autumn colours.
Roots: Deep roots that collect nitrogen, somewhat sensitive; do not transplant once established.
Demands: Full sun or light shade, likes warmth and tolerates heat, not very frost hardy.
Soil: On all moderately dry to fresh, well drained, acidic or only slightly alkaline, poor substrates; increased sensitivity to frost on heavy soil; avoid fertilising.
Note: Avoid cutting, only remove frost damage.
Hardiness: Zone 5a