According to Missouri Botanical Garden, gardeners in warmer climates can prune back bluebeard shrubs in autumn or in early spring before new growth appears to improve their shape and overall appearance. These shrubs bloom on new growth, so hard pruning in autumn or early spring won't affect their flower production.
How do you prune a Bluebeard Bush?
To keep the plant shaped and flowering, Caryopteris plants should be cut down by at least half in the early spring. You can cut them back to 12 to 18 inches without harm. As the plants age, you will get some dead wood in the center. Prune this out as needed.
How do you prune a Bluebeard spirea?
How to Prune the Blue Beard Spirea
- Examine your blue beard in late winter or early spring for emerging buds along the twiggy stems.
- Cut down to live buds, removing any winter-damaged top growth anywhere from 3 inches to 1 foot above the ground.
