Do not be in a hurry to clear the stems of lower branches until the main stems are growing strongly.After a year or two, restrict the number of main stems by selecting three to five strong, well-spaced shoots and cutting out any weak or surplus shoots to the base.Make the cut horizontal and trim the wound so there are no rough edges the cut stimulates dormant buds which should shoot strongly the following year.Choose a young plant (less than 1m/3¼ft tall) and cut back either close to ground level (but not less than 8cm or 3in), or to about 30-60cm (1-2ft) from the ground.Birches bleed heavily at all other times, particularly in late winter. When pruning is required, prune only when fully dormant from late summer to before mid-winter. Take care that a prevailing wind, shade or competition from other plants do not cause lopsided growth.Hard pruning is not recommended for birches.Remove diseased or damaged wood, together with any laterals that cross another shoot or form too narrow an angle with the main stem.Remove laterals at the base of a young tree to produce a clear trunk of 2m (6½ft).Pruning and training General pruning considerationsĮstablished trees do not require regular pruning. RHS Garden Wisley Flower Show - 6–11 September 2022.RHS Garden Rosemoor Flower Show - 19–21 August 2022.RHS Garden Hyde Hall Flower Show - 3–7 August 2022.RHS Flower Show Tatton Park - 20–24 July 2022.
RHS Hampton Court Palace Garden Festival - 4–9 July 2022.
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