GardenWizzPlant Care Card

Laburnum

Laburnum anagyroides · Tree

Hardiness

H6 Hardy — very cold winter (to −15 to −20°C)

Position

Full sun, Partial shade

Height × Spread

8 m × —

Soil

moist, well-drained; chalk, clay, loam, sand; acid, alkaline, neutral pH

Flowering

May–June

Toxicity

All parts of the tree, especially the seeds, are toxic to humans and animals if ingested. Contains cytisine.

The Gardening Year

🪴 Plant out

🌸 In flower

✂️ Prune

Aphids: Squash by hand or use a strong jet of water; apply insecticidal soap if infestations are severe.

Powdery mildew: Improve air circulation by pruning; apply a fungicide if necessary and avoid overhead watering.

Silver leaf: Prune out infected branches well below the visible symptoms and burn them to prevent spread.

Honey fungus: Improve drainage and soil health; remove infected roots and avoid replanting susceptible species nearby.

Leaf-mining insects: Rake up fallen leaves to reduce overwintering populations; severe cases may require insecticide.