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.
Call us at for all your Fullerton CA tree service needs! We give free estimates on all projects, large and small. How to Prune Deutzia Pruning is carried out by taking out all of the flowered stems - pruning Deutzia back by about one third of their previous length. So, each stem that has the faded flowers on, should be cut back, leaving around two thirds of the stem on the stumplop.buzzted Reading Time: 3 mins. Jan 27, Pruning and caring for deutzia. Once settled in, deutzia is a plant that needs little care.
It does, however, require some attention both for pruning and for watering, if you want to enhance its blooming and growth.
Pruning deutzia. Prune the sprigs of the year by more or less half, when the flowers have died off.
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.