How To Prune Summersweet Clethra. Summersweet blooms on the current years growth so the best time to prune the bush is in late winter before the new buds have set on the limbs. This type of pruning opens up the interior of the plant and limits regrowth.
You can improve the performance of this shade lover even more with proper pruning. Step 1 - Clean Away Debris. Beside this how do you prune Clethra alnifolia.
Dip ends in rooting hormone and tuck into a mixture of 12 perlite and 12 potting soil.
Remove one-fourth of the plants oldest woodiest canes at ground level with loppers in late winter to early spring. No serious pest or disease issues. Step 3 - Remove Dead Branches. Cut off damaged diseased or crossing canes from Hummingbird summersweet whenever you notice them.
