Salix cinerea

Grey Willow

Physical Traits & Growth

Typical max. heightiMaximum height in typical conditions, in metres. Full data also shows maximum achievable height in exceptional conditions.:
4-8m 3
6m 5
617m 7

Max. canopy widthiLikely maximum horizontal width of the canopy, in metres: 2.5-4m wide 2

Size of shadowiSize of shadow based on a fully grown tree, categorised as low, medium or high: Low (19 sqm)

Canopy densityiShading intensity of the canopy when in full leaf. Categorised from open to dense.: Open 1

Leaf emergenceiTime of leaf emergence, categorised as very early, early, late, or evergreen: Early (Apr to Nov 1)

Growth rateiHow quickly the tree grows during establishment. Categorised as low, moderate or high, with very high used in exceptional cases.:
High 2
Risk of outcompeting slower-growing tree species 6

LongevityiExpected lifespan of the tree: Around 100+ years 2

Management & Systems

Typical systemsiCommon agroforestry or silvicultural systems where this species is used:
Arable or pasture 1
Lowland or upland 2

Approach to silvicultureiCoppicing and pollarding ability: Can be coppiced

Establishment requirementsiCommon requirements to establish the tree:
Intolerant of weed competition 6
Will require protection from high herbivore pressure 6

Management requirementsiCommon long-term management needs such as pruning. Categorised as low, moderate or high.: Minimal or no pruning 1

Pruning timeiOptimal season for pruning: Spring (late) to summer 1

Grey Willow, Reading, UK / Tom Staton / https://creativecommons.org/licenses/by-sa/4.0/deed.en

Products & Economy

Food productsiCommon food products such as fruits and nuts:

Wood productsiCommon wood products, including timber, turnery, and pulp:

BiomassiCommon biomass products such as fuelwood: Fuelwood 25

Speciality productsiOther speciality and niche products:

Time until market (food)iNumber of years until the tree produces food products:

Time until market (timber)iNumber of years until the tree produces wood products: Rarely coppiced; likely 12-15 years 15 or 2-3 years for a short rotation 16

Ecology & Utility

Nutrient and organic matter accumulationiRough estimate of soil-improving properties, with larger and deeper-rooting trees predicted to have higher value. Categorised as low, moderate or high.: Low – likely moderate root depth and low canopy area

Nitrogen fixationiNitrogen-fixing properties, categorised as yes or no: No

High carbon sequestrationiAll trees sequester carbon, but faster-growing, larger trees generally have higher sequestration potential.:
Short-term (20 years): Relatively low
Medium-term (40 years): Very low
Long-term (60 years): Very low

Native status in the UKiCategorised as native, long-established, or recent introduction.: Native 1

High wildlife valueiMost trees are likely to be of some value to wildlife, but some trees are of generally higher value to various wildlife groups:
High 5
Highest value for foliage invertebrates, pollen and nectar 5

Other environmental impactsiOther impacts such as water consumption and nutrient leaching:
High water consumption in wet conditions 1
High potential to reduce nutrient leaching 5

Pollinators

Flowering period (pollinator benefit)iTypical flowering months: Mar-Apr 1

High pollen and nectar value for pollinatorsiValue of flowers to pollinators: High 1

Susceptibility & Risks

Risk of toxicity to livestockiReported potential toxicity to livestock, categorised as yes or no. Toxicity is complex and often context-specific.: None known

Risks to farming operationsiOther risks such as suckering roots, very large tree size, secondary host for aphids, and flammability: Can block drains if planted across them 3

Disease susceptibilityiSusceptibility of the tree (not tree products) to diseases, e.g. fungal and bacterial disease:
High
Susceptible to watermark disease 35 and foliar rust diseases 5
Susceptible to willow anthracnose, scab, canker, honey fungus, rust 6

Invertebrate pest susceptibilityiSusceptibility of the tree (not tree products) to invertebrate pests, e.g. aphids and other insects:
High
Susceptible to aphids, caterpillars, leaf beetles, sawflies 6

Vertebrate damage susceptibilityiSusceptibility of the tree (not tree products) to vertebrate pests, e.g. squirrels and deer:
Moderate to high
Moderate sensitivity to browsing 7, highly palatable 8