My rosebush has a double bud growing in one bud spot. How often does this happen, and what causes this to happen.

Proliferation

New flowers are produced as usual but at their heart, new buds form. In some cases, a large number of new buds are being produced from an otherwise normal flower.

Most often seen in Spring, Proliferation seems to affect certain rose cultivars year after year but can been seen from almost any rose. Proliferation is not a disease but caused when the apical cells are multiplying so fast that they do not stop dividing when a flower is produced, but they keep on dividing and produce a cluster of new buds in the center of the earlier flower. If the condition bothers you, simply prune off the affected flowers and the next flower produced by that stem should be normal.


Balling