How Do I Prune a Blackcurrant Bush Correctly?

Blackcurrant pruning follows a different logic to most other fruit bushes. Because blackcurrants produce their best fruit on young wood grown in the previous season, the goal of pruning is to continually renew the bush by removing old wood and encouraging vigorous new growth from the base. Get this right and a well-pruned blackcurrant bush will crop reliably for twenty years or more.

When to prune blackcurrants

The best time to prune blackcurrants is immediately after harvest in late summer or early autumn, while you can still see the difference between fruited wood and this season's new growth. Pruning can also be done during winter dormancy between November and February. Avoid pruning in spring when new growth is beginning and sap is rising, as this stimulates soft growth vulnerable to late frosts.

What wood to remove

Each autumn, aim to remove roughly one third of the bush — specifically the oldest, darkest wood. Old stems are dark brown to black in colour, often have peeling bark, and may carry little or no new growth. Young stems are paler, greener, and more upright. Cut old stems right back to ground level or to a strong young shoot near the base. Use sharp, clean secateurs or loppers for stems up to a centimetre in diameter; a pruning saw for anything thicker.

Removing fruited sideshoots

Blackcurrants carry fruit on sideshoots that grew in the previous season. After fruiting, these sideshoots have done their job. On younger main stems that you are keeping, you can cut back the sideshoots that carried fruit to one or two buds from the main stem, encouraging new fruiting shoots to develop in their place. This is a refinement rather than an absolute requirement — removing whole old stems is more important.

Shaping an open bush

A well-managed blackcurrant bush should be open in the centre with good airflow to reduce disease pressure. Crossing branches and shoots that grow inward toward the centre can be removed entirely. The bush should ideally have a balanced mix of young, medium, and mature stems — never all old or all new. After a few years of annual pruning you will develop an eye for which stems to keep and which to remove.

First year pruning after planting

Newly planted blackcurrants benefit from hard pruning immediately after planting in autumn or winter. Cut all stems down to two or three buds from the ground. This sacrifices the first year's crop but establishes a strong root system and encourages a good framework of vigorous new shoots from the base. Without this initial hard pruning, plants often produce a weak framework of leggy stems that crops poorly for years.

Tools and hygiene

Always use clean, sharp tools. Wipe blades with a cloth moistened with garden disinfectant or meths between bushes if you are working through a row, especially if any bushes show signs of reversion virus or dieback. Blunt secateurs crush stems rather than cutting cleanly, increasing the risk of infection at the wound.