Trinity College Birch Trees

• Variety: Trinity College, the white-barked birch that stays small
• Common name: Himalayan birch
• Latin name: Betula utilis subsp. jacquemontii 'Trinity College'
• Type: Deciduous tree
• Mature height: About 6m (20ft) in 10 years, 8m (26ft) at most
• Spread: 2.5-4m
• Habit: Upright and narrow, with a light canopy
• Bark: Bright white and peeling, at a younger age than other birches
• Autumn colour: Buttery yellow
• Soil: Most soils. Best on acid or neutral ground, takes alkaline
• Position: Full sun or light shade. Sun gives the whitest trunk
• Hardiness: H7, hardy anywhere in the UK
• RHS AGM: No (Snow Queen, the taller selection, holds it)
• Good for: Small gardens, front gardens, winter bark
• Container suitable: For a few years in a large pot, then plant it out
• Similar varieties: Snow Queen (taller), Himalayan Birch (the full-sized parent)
• Sold as: Pot-grown tree in a 12 litre pot
• Plant: Any month. Autumn to early spring planting needs the least watering
• Delivered: Year-round, whenever it is in stock. Collection from Castle Cary also available

Trinity College is the Himalayan birch for a garden without room for a Himalayan birch: the same pure white bark on a narrow tree that reaches about 6m (20ft) in ten years and stops at 8m, with a crown 2.5 to 4m across.

Trinity College Birch: White Bark on a Tree That Stays Small

Trinity College is a small, upright selection of the Himalayan birch, Betula utilis subsp. jacquemontii, grown for bright white peeling bark that shows at a younger age than on other birches. It reaches about 6m in ten years and tops out at 8m, where its relations carry on past 12m. Dark green, saw-edged leaves open in spring alongside yellow-brown catkins, turn buttery yellow in autumn and hang on late. Then the bark has the garden to itself all winter, which is the point of the tree.

The habit is narrow and the canopy light, so the shade beneath is dappled and you can garden under it. If you have the room, Snow Queen and the plain Himalayan Birch make bigger trees. Trinity College is for the front garden, the courtyard bed, or the corner where a full-sized birch would be a quarrel with the neighbours in twenty years. Full sun gives the whitest bark, and a moist root run while it settles in is all the care it asks for.

Your tree arrives pot-grown in a 12 litre pot, so any month will do for planting. Stake it on the day; our guide on how to plant a tree with a stake shows the method.

A Dublin Tree Raised from Kew Seed

The name is an address. The original tree grew at Trinity College Botanic Garden in Dublin, raised from seed that Joseph Hooker sent over from Kew in about 1883. It showed its white bark sooner than the run of Himalayan birches and kept a neater shape, and every Trinity College birch is a piece of that one seedling, struck from cuttings so that it stays identical to the original. Pressed specimens taken from the Dublin tree in the 1960s are still in the college's collection. Yours grows on its own roots, so there is no graft to watch and no rootstock to send up the wrong sort of shoot.

Planting Companions

White bark wants a bright neighbour in winter. The red and orange stems of dogwoods in low sun are the classic pairing, and snowdrops are happy in the light shade under a birch, where shallow roots keep the soil on the dry side. For a second tree on the same scale, look through our trees for small gardens. And if the garden turns out to be bigger than you thought, Snow Queen is the same white on a larger scale.

Why Ashridge?

Ashridge Nurseries has sold trees by mail order since 1949 and was named Which? Best Plant Supplier 2025. Your birch is pot-grown in peat-free compost, one of our full range of birch trees. Delivered leafless between November and March, it is guaranteed for 12 months.

Frequently Asked Questions

What is the difference between Trinity College and Snow Queen birch?

Size is the difference: Trinity College stops at about 8m, while Snow Queen grows past 12m. Both are white-barked selections of the Himalayan birch. Snow Queen holds the RHS Award of Garden Merit; Trinity College fits the smaller garden.

Is Trinity College birch a good tree for a small garden?

Trinity College is the white-barked birch to choose for a small garden, reaching about 6m in ten years and 8m at most, with a narrow crown 2.5 to 4m across. The canopy is light, so you can plant underneath it.

Can I grow Trinity College birch in a pot?

Trinity College grows well in a large pot for a few years, but it belongs in the ground in the long run. Keep it watered, because birches resent drying out, and plant it out before it starts to sulk.

When does the white bark appear on a Himalayan birch?

White bark appears on Trinity College at a younger age than on other birches, which is what it was selected for. Peeling is normal: the old layer comes away in papery strips to show fresh white beneath.

When is the best time to prune a birch tree?

Prune a birch in late summer or autumn, and only if you must, because cuts made in late winter or spring bleed sap heavily. Trinity College needs no routine pruning beyond taking out a damaged or crossing branch.

Will Trinity College birch grow on chalk?

Trinity College grows on alkaline soil, though it does best on acid or neutral ground. On thin chalk expect a smaller tree, and mulch it each spring to hold moisture at the roots.