Why I've stopped recommending silver birch
For years silver birch was one of the first trees I would suggest for a garden. It is light, graceful and quick to give you height. After the summer we've had, I've changed my mind. A lot of silver birch in the south has struggled badly, and in most gardens, especially in the south and east, I now reach for other trees instead.
Why silver birch is struggling
Silver birch, Betula pendula, is a tree of cool, northern climates. It grows naturally across northern Europe and into Scandinavia, where summers are mild and rainfall is steady. It is also a pioneer: quick to grow, quick to colonise open ground and, by tree standards, fairly short-lived.
Its roots are shallow and spread widely near the surface. That suits a cool, damp climate, but it means the tree has little to draw on when the top layer of soil dries out. In a long, hot, dry spell, silver birch is one of the first trees to show stress. You see leaves yellowing and dropping in midsummer, thin crowns and, after repeated dry years, dieback in the upper branches.
A stressed tree is also more open to pests and diseases, so the damage from one hard summer can carry on into the next few years.
Where silver birch still works
This isn't about banning a lovely native tree. In the north and west, on soils that stay moist, and in cooler, wetter spots, silver birch can still do well. A cool, wet county like Cumbria, where I garden now, is a very different place for a birch from a dry garden in Surrey or Kent. But if you garden in the south or east, on free-draining soil, or somewhere that bakes in summer, I'd think twice before planting it now.
Birches I'd plant instead
If you love the look of birch, there are better choices for a changing climate.
River birch, Betula nigra: from the south-eastern United States, so it is used to hot summers. It copes with heavy, damp and even occasionally wet soils, and has beautiful peeling, cinnamon and cream bark. It is lovely as a multi-stem.
Downy birch, Betula pubescens: our other native birch. It is at home on wetter, heavier ground where silver birch would sulk, and it is a good choice for damp corners and wildlife planting.
Both still give you that light, airy canopy and the movement that makes birch so special, without being quite so dependent on cool, steady weather.
Choosing a tree for a hotter, drier future
Look at where the tree grows naturally. Trees from warmer, drier summers usually cope better.
Match the tree to your soil: free-draining and dry, or heavy and damp.
Plant small. Younger trees establish faster and cope better with dry spells.
Water deeply and less often for the first two or three summers.
Mulch a wide circle around the base to keep moisture in the soil.
Other trees worth considering
Beyond birch, there are some brilliant trees that handle heat and dry summers far better. My current favourites are Zelkova serrata, Heptacodium miconioides and Parrotia persica, and I've written about all three in the climate-resilient trees I'm planting now. If you're planting bare-root, my guide to planting bare-root trees and hedging will help them get off to a strong start.
Quick answers
Is silver birch a good tree for a small garden?
It can be in cooler, wetter parts of the UK, but in the south and east it often struggles in hot, dry summers. River birch is a more reliable choice for a similar look.
Why are the leaves on my birch turning yellow in summer?
Yellowing and early leaf drop in midsummer is usually a sign of drought stress. A deep, slow soak once a week in dry spells and a thick mulch will help.
Which birch is best for heavy clay?
River birch, Betula nigra, and downy birch, Betula pubescens, both cope with heavier, damper soils than silver birch.
