Trees

Appearance: Large tree with smooth, grey bark and simple, oval leaves with wavy edges. CO₂ Capture: High; large canopy and dense wood store substantial carbon. Water/Drought Tolerance: Prefers moist, well-drained soils; sensitive to drought. Best Planting Spots: Flood Reduction: Suitable for well-drained slopes; not ideal for waterlogged areas. Air Pollution: Effective in large parks and rural areas; less tolerant of urban pollution. Drought Areas: Not suitable for dry regions.

Appearance: Medium to large deciduous tree with broad, lobed leaves and smooth gray bark; turns bright yellow in autumn. CO₂ Capture: Moderate to high; relatively fast-growing with a broad canopy. Water/Drought Tolerance: Tolerates a wide range of soils and urban conditions; moderately drought-tolerant. Best Planting Spots: Flood Reduction: Useful in urban landscapes and streetscapes. Air Pollution: Well-suited to city environments due to its pollution tolerance. Drought Areas: Can handle dry conditions but prefers regular moisture.

Appearance: Medium-sized tree with simple, serrated leaves; produces white or pink flowers and small, red to black fruits. CO₂ Capture: Moderate; medium size means moderate carbon storage. Water/Drought Tolerance: Prefers well-drained soils; moderately drought-tolerant. Best Planting Spots: Flood Reduction: Not typically used for flood reduction. Air Pollution: Suitable for urban planting; adds aesthetic value with spring blossoms. Drought Areas: Can tolerate dry conditions but thrives in moist soils.

Appearance: Massive evergreen tree with thick, fibrous reddish-brown bark and scale-like leaves; among the largest trees in the world by volume. CO₂ Capture: Extremely high; due to its immense size and longevity, it stores a substantial amount of carbon. Water/Drought Tolerance: Prefers moist, well-drained soils; moderately drought-tolerant once established. Best Planting Spots: Flood Reduction: Suitable for high rainfall areas and large open spaces. Air Pollution: Effective in large urban parks and estates for improving air quality. Drought Areas: Can survive moderate drought conditions when mature.

Appearance: Large tree with lobed leaves and produces acorns. CO₂ Capture: High; long-lived and large, storing significant amounts of carbon. Water/Drought Tolerance: Prefers moist soils but can tolerate drought once established. Best Planting Spots: Flood Reduction: Suitable for planting in floodplains to reduce flood risk. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can withstand dry conditions once mature.

Appearance: Small deciduous tree with showy white or pink bracts in spring; dark green leaves turning reddish-purple in fall; red berries in late summer.​ CO₂ Capture: Moderate; modest size limits overall carbon sequestration.​ Water/Drought Tolerance: Prefers moist, well-drained soils; tolerant of seasonal dry periods but not severe drought.​ Best Planting Spots: Flood Reduction: Not typically used for flood mitigation; prefers well-drained sites.​ Air Pollution: Sensitive to pollution; thrives best in areas with good air quality.​ Drought Areas: Not ideal for regions with frequent droughts due to shallow root system.​ Note: Flowering dogwood is intolerant of extended drought periods, especially during the first year after planting.

Appearance: Medium-sized tree with small, lobed leaves; produces winged seeds. CO₂ Capture: Moderate; smaller size means it stores less carbon than larger trees. Water/Drought Tolerance: Tolerant of dry conditions once established. Best Planting Spots: Flood Reduction: Useful in hedgerows and field boundaries to reduce surface runoff. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Suitable for dry regions due to its drought tolerance.

Appearance: Small to medium-sized conifer with needle-like or scale-like leaves; produces blue, berry-like cones. CO₂ Capture: Moderate; compact size limits total carbon storage. Water/Drought Tolerance: Very drought-tolerant; thrives in dry, rocky soils. Best Planting Spots: Flood Reduction: Not commonly used for flood reduction. Air Pollution: Suitable for urban planting due to its hardiness. Drought Areas: Ideal for dry regions due to its excellent drought tolerance.

Appearance: Tall tree with broad leaves that have five lobes; produces winged seeds that spin like helicopters when they fall. CO₂ Capture: Moderate; grows quickly and captures a fair amount of CO₂. Water/Drought Tolerance: Adaptable; tolerates both wet and dry conditions. Best Planting Spots: Flood Reduction: Suitable for areas prone to flooding due to its tolerance to wet soils. Air Pollution: Good at withstanding polluted environments, making it suitable for cities. Drought Areas: Can survive in dry areas once established.

Appearance: Tall evergreen tree with thick, fibrous reddish-brown bark; needle-like leaves in a flat arrangement. CO₂ Capture: Very high; one of the most effective trees for carbon sequestration due to its massive size and longevity. Water/Drought Tolerance: Prefers moist, well-drained soils; moderately drought-tolerant once established. Best Planting Spots: Flood Reduction: Suitable for planting in areas with high rainfall to reduce excess water flow. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can tolerate dry conditions but prefers consistent moisture.

Appearance: Large tree with big, hand-shaped leaves; produces spiky fruits containing shiny brown seeds known as conkers. CO₂ Capture: High; large size allows it to store more carbon. Water/Drought Tolerance: Prefers moist, well-drained soils; not very drought-tolerant. Best Planting Spots: Flood Reduction: Parks and large gardens where soil is moist. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Not suitable for dry regions.

Appearance: Fast-growing evergreen tree with dense, dark green foliage. CO₂ Capture: Moderate; rapid growth allows for quick carbon sequestration, but shorter lifespan limits total storage. Water/Drought Tolerance: Adaptable; tolerates a range of conditions. Best Planting Spots: Flood Reduction: Not typically used for flood reduction. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can tolerate dry conditions but prefers moderate moisture.

Appearance: Tall tree with clusters of leaflets (compound) arranged oppositely along a central stem; smooth, grey bark when young, becoming rougher as it ages. CO₂ Capture: Moderate to high; grows quickly, so it absorbs a good amount of CO₂. Water/Drought Tolerance: Prefers moist soil but can handle short dry periods. Best Planting Spots: Flood Reduction: Near rivers or streams to help prevent erosion. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Not ideal for very dry places. Important to note: Ash dieback, caused by the fungus Hymenoscyphus fraxineus, poses a significant threat to ash trees in the UK, with projections indicating the potential loss of up to 80% of these trees. The disease spreads via wind-borne spores, complicating control efforts. Consequently, ash trees may be unsuitable for current climate and flood mitigation initiatives.

Read more at https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/tree-pests-and-diseases/key-tree-pests-and-diseases/ash-dieback/​

Appearance: Tall evergreen tree with soft, flat needles and thick, ridged bark. CO₂ Capture: High; large size and rapid growth allow it to store substantial carbon. Water/Drought Tolerance: Prefers moist, well-drained soils; moderately drought-tolerant once established. Best Planting Spots: Flood Reduction: Suitable for planting in moist areas to reduce flood risk. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can withstand dry conditions once mature.

Appearance: Tall evergreen tree with sharp, stiff needles and thin, scaly bark. CO₂ Capture: High; fast-growing species that sequesters significant carbon over its lifespan. Water/Drought Tolerance: Prefers moist, well-drained soils; not very drought-tolerant. Best Planting Spots: Flood Reduction: Suitable for planting in moist areas to reduce flood risk. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Not suitable for dry regions.

Appearance: Tall evergreen tree with blue-green needles and reddish-brown bark. CO₂ Capture: High; long-lived and large, storing significant amounts of carbon. Water/Drought Tolerance: Adaptable; tolerates both wet and dry conditions. Best Planting Spots: Flood Reduction: Suitable for areas prone to flooding due to its tolerance to wet soils. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can survive in dry areas once established.

Appearance: Medium-sized tree with rounded leaves and produces small, woody cones. CO₂ Capture: Moderate; grows quickly and captures a fair amount of CO₂. Water/Drought Tolerance: Thrives in wet conditions; not very drought-tolerant. Best Planting Spots: Flood Reduction: Ideal for wet areas, such as riverbanks, to help prevent erosion. Air Pollution: Suitable for urban planting; adds aesthetic value with its attractive foliage. Drought Areas: Not suitable for dry regions.

Appearance: Large tree with heart-shaped leaves and clusters of small, fragrant, yellowish-white flowers. CO₂ Capture: High; large size and dense foliage allow it to store significant amounts of carbon. Water/Drought Tolerance: Prefers moist, well-drained soils; moderately drought-tolerant once established. Best Planting Spots: Flood Reduction: Suitable for planting in floodplains to reduce flood risk. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can withstand dry conditions once mature.

Appearance: Small to medium-sized tree with multiple small leaflets (compound) arranged oppositely along a central stem; produces clusters of bright red berries. CO₂ Capture: Moderate; smaller size means it stores less carbon than larger trees. Water/Drought Tolerance: Tolerant of a range of soil conditions, including poor soils; moderately drought-tolerant. Best Planting Spots: Flood Reduction: Useful in urban settings to reduce surface runoff. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Suitable for dry regions due to its drought tolerance.

Appearance: Medium-sized tree with distinctive white, peeling bark; small, triangular leaves with serrated edges. CO₂ Capture: Moderate; grows quickly but has a shorter lifespan, so it stores a fair amount of carbon. Water/Drought Tolerance: Adaptable; tolerates both wet and dry conditions. Best Planting Spots: Flood Reduction: Suitable for areas prone to flooding due to its tolerance to wet soils. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Can survive in dry areas once established.

Appearance: Medium-sized tree with serrated, oval leaves that turn golden in autumn; smooth, grey bark that becomes ridged with age. CO₂ Capture: Moderate; dense wood stores a fair amount of carbon. Water/Drought Tolerance: Prefers moist, well-drained soils; moderately drought-tolerant once established. Best Planting Spots: Flood Reduction: Useful in hedgerows and field boundaries to reduce surface runoff. Air Pollution: Effective in urban areas for improving air quality. Drought Areas: Tolerates dry conditions once mature.