If you want to attract pollinators to your garden consider this.
Mont Rose, D.
Deutzia – Pruning, Winter Care and Fertilizing. Prune these spring flowering shrubs soon after they have bloomed. Top prune the plant to improve the shape and reduce its size, but be careful not to remove more than 30% of the top growth.
Some summer pruning can also be done on particularly vigorous plants, but not after mid-July. Jul 02, How to keep your Deutzia looking good every year by pruning out the old wood after flowering in June / treecutter.bar://treecutter.barzia Care Articleht. Pruning deutzia Prune the sprigs of the year by more or less half, when the flowers have died off. To reshape or reduce the size of your deutzia, annual pruning in summer, after the blooming, is called for.
Sometimes, if pruned too severely, a deutzia might need a whole year to recover and bloom. You may decide that your deutzia needs rejuvenation pruning. To do this, cut between one fifth and one third of the branches back to about cm from the ground.
The number of branches you remove depends on how quickly you want to rejuvenate the plant.
If your deutzia needs pruning, the best time to do this is in harvest fallen trees after the plant has flowered. Most gardeners think it is a shame to prune before flowering as this reduces the number of flowers. To keep the plant reasonably compact, the side branches can be cut back to just above a leaf.