How to Grow Goat Willow
Salix caprea
Goat Willow is a hardy native tree best known for its spectacular silver-grey pussy willow catkins in late February and March — a highlight of late winter. Plant in full sun or partial shade in any reasonably moist soil; it tolerates clay and wet ground well. Water during dry spells in the first two years. Prune lightly after flowering or in late summer. Can be hard coppiced or pollarded every few years to keep a manageable size and maximise catkin display.
Yearly Lifecycle
Care Essentials
Mulch with compost or well-rotted manure in spring for the first few years to aid establishment. Established trees thrive without feeding — they are vigorous and adapt well to poor soils.
Watch For
- Willow scab (dark leaf spots and shoot dieback in wet springs)
- Giant willow aphid colonies on branches in late summer
- Willow leaf beetle skeletonising leaves in summer
- Honey fungus at the base of established trees
Companions
Alder (Alnus glutinosa), Marsh Marigold (Caltha palustris), Purple Loosestrife (Lythrum salicaria), Hazel (Corylus avellana)
Pet Safety
Care Requirements
Light
Full sun to partial shade
Thrives in full sun or partial shade. Best catkin display in an open, sunny position.
Watering
Regular watering when young; tolerates wet ground
Water regularly during the first two to three years. Once established, Goat Willow tolerates wet and waterlogged soils and rarely needs extra watering except during prolonged drought.
Fertilizing
Mulch young trees; no feeding needed once established
Apply a mulch of compost or well-rotted manure in spring for the first few years. Established trees are vigorous and need no additional feeding.
Pruning
Light pruning after flowering; coppice every 3-5 years if desired
Prune lightly after flowering in early spring or in late summer to avoid sap bleeding. Hard coppicing or pollarding every 3-5 years keeps the tree compact and maximises catkin display.
Spacing
6-10m for a standard tree; less if coppiced
Allow 6-10m spacing for a standard specimen tree. If managed as coppice or pollard, closer spacing of 3-4m is acceptable.
Growing Tips
Enjoy the catkins — they are the highlight
The silky silver-grey catkins appear before the leaves in late February and March and are the main reason to grow this tree. Female catkins are silvery-grey; male catkins turn golden-yellow with pollen. They are superb for early bees.
Tolerate wet and clay soils
Unlike many trees, Goat Willow thrives in heavy, waterlogged clay — ideal for boggy corners or pond margins where little else will grow.
Coppice or pollard for catkin display
Hard pruning every 3-5 years produces long straight stems packed with catkins. Coppicing to the base gives a multi-stemmed shrub; pollarding at 1.5-2m gives a headed tree. Either maximises catkin display and keeps the plant to a manageable size.
Excellent wildlife tree
Goat Willow supports over 450 insect species including the purple emperor butterfly. Its catkins are an essential early nectar source for bumblebees and honeybees emerging in late winter.
Pests & Diseases
Pest Giant Willow Aphid
Identification: Large (up to 6mm) brown aphids clustered in masses on bark of branches and trunk, often with ants in attendance; honeydew drips below
- Blast off small colonies with a strong jet of water
- Encourage natural predators such as ladybirds and lacewings
- Spray with a contact insecticide containing pyrethrins for severe infestations
Pest Willow Leaf Beetle
Identification: Shiny metallic blue-green beetles and pale larvae feeding on leaf surfaces, leaving a skeleton of veins
- Pick off adults and larvae by hand on small trees
- Encourage natural predators
- Pyrethrin-based spray for severe repeated defoliation on young trees
Disease Willow Scab Venturia saliciperda
Symptoms: Dark olive-brown spots on leaves in spring, rapid leaf fall, and dieback of young shoots with curling and blackening
Treatment: Remove and destroy affected shoots and fallen leaves. Improve air circulation by thinning the crown
Prevention: Avoid overhead irrigation. Prune in dry weather. Salix caprea usually recovers without intervention
Disease Honey Fungus Armillaria mellea
Symptoms: Sudden dieback of branches or whole tree; white mycelium sheets under bark at the base; honey-coloured toadstools in autumn; black bootlace-like rhizomorphs in the soil
Treatment: No cure — remove and destroy all infected wood and roots. Do not compost. Replace with resistant species
Prevention: Maintain tree health through mulching and good drainage. Avoid wounding roots
