How to prune salvia nemorosa 'ostfriesland'

Immediately after each bloom flush fades; final cutback in late autumn. Use hedge shears to cut the whole plant back by half to two-thirds after each flush. For the final autumn cut, reduce to 4–6 inches above the base once flowering has completely finished.

Two to three times per season. Salvia 'Ostfriesland' (East Friesland) reblooms vigorously if cut back hard after each flush. Shear by half to two-thirds as soon as the first spikes fade to trigger new growth and a second flush. It often produces three flushes in a season with prompt pruning. Cut to the base in late autumn.

Use hedge shears to cut the whole plant back by half to two-thirds after each flush. For the final autumn cut, reduce to 4–6 inches above the base once flowering has completely finished.