Alkaline tolerant plants suitable for windbreaks: Blackberry - good at filling out both top and bottom of windbreaks Siberian Pea - windbreak Hazel - doesn't need as much protection as insect-pollinated trees Hawthorns - windbreak/ good dense hedge when clipped, and leafs early Beech - native windbreak, keeps leaves through winter if hedge clipped to 2m or less Elders - windbreak (but can take over a hedge if allowed to grow unchecked) Rowan - tough native windbreak Other (not listed on high-alkaline tolerant lists) edible fruiting trees/ shrubs suitable for windbreaks or thickening out bottoms of hedges include: Worcesterberry Ramanas rose Gooseberry (where only moderate winds are expected) Elaeagnus (various kinds, Autumn Olive sounds great) Damson Crab apple Mulberry (marginally more wind tolerant, like Hazel, due to being wind- and not insect-pollinated)