Remove old flowers to encourage re-bloom.
} Prunus cerasifera‘Thundercloud’ -- ‘Thundercloud’ Cherry Plum Page 3 Other Figure 3. Foliage of ‘Thundercloud’ Cherry Plum. Roots: surface roots are usually not a problem Winter interest: no special winter interest Outstanding tree: not particularly outstanding Invasive potential: little, if Missing: Cary NC. You can prune in nearly any month, except during late summer or early fall, without damaging the tree's overall health, although one time of year is always bushdigging.clubg: Cary NC.
The best time to begin a pruning regimen of any tree is at the planting, notes the University of Minnesota Extension.
White Pines should be trimmed in summer.
Flowering plum trees must develop strong, woody trunks. Cutting back weak Missing: thundercloudCary NC. Dec 21, Common plum fungal diseases such as black knot, which causes warty growths on 'Thundercloud' branches, and brown rot, which causes cankers and rotten fruit, can be managed by following good sanitation practices.
Rake up and destroy fallen fruits and leaves, which may harbor diseases, and prune out and destroy limbs with fungal bushdigging.clubg: Cary NC. Prune after flowering, but not after July 10th. Always prune to a whorl of leaves or to the next branch. Cary NC or renovative pruning should be done in February.