Most raspberry plants flower late in the spring, and bear their fruits in early to.

Remove the small, weak canes, leaving only four or five of the largest, most vigorous canes per clump or plant. Cut back the lateral (side) branches to 12 inches in length for black raspberries and 18 inches for purple raspberries.

When pruning is completed, remove. Jan 31, Prune summer fruiting raspberries in the late summer or fall, after the berries have been harvested.

Since these canes bear berries on second year growth, the aim is to prune out only those canes which have fruited this year (floricanes).

How you prune a raspberry plant depends upon when the plant bears fruit-once a year or twice a year.

You will leave this season’s canes (primocanes) in bushmulch.barted Reading Time: 9 mins. Dec 01, In their second year, it’s time to start cutting back black raspberries.

You will likely get a small harvest of berries in the late spring or early summer. After the plants quit fruiting, you will begin pruning the black raspberry bushmulch.barted Reading Time: 3 mins.

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When to Prune Raspberry Plants Once your raspberry plants have put on enough growth (which may not be until after their first year with you), aim to prune in the early spring, just as new growth emerges. Prune young canes back until they are around 4 to 5 feet tall. In early winter- once your canes have finished fruiting- cut all canes back down to ground level.

And there we have it: a straightforward guide to pruning your raspberry row. This in turn, encourages productive growth and good fruit crops. Top Tips for Keeping your Raspberry Canes Happy. elenaiks / Estimated Reading Time: 8 mins.