Water is a combination of two atoms of hydrogen and one atom of oxygen. Oxygen makes up about 63% of a typical animal and about 77 percent of a typical plant. The element carbon is familiar to almost everyone in the form of charcoal, which is nearly pure carbon.ater is a combination of two atoms of hydrogen and one atom of oxygen. Oxygen makes up about 63% of a typical animal and about 77 percent of a typical plant. The element carbon is familiar to almost everyone in the form of charcoal, which is nearly pure carbon.
Prune the roses after the buds break dormancy. The major pruning period for knockout roses is in late winter to early spring, just as the bush begins to break out of its dormancy stage. 1  Check for bud formation on the stems of the plant. 2  You can still prune the plant even if new growth is starting to develop, though.
Pruning. Pruning is the most important thing you can do for a Knock Out rose. In February, remove dead wood or broken branches before shaping the bush. Open up the inside of the bush by removing unproductive interior branches. Cut back the healthy branches by one-third to one-half, but do not shear them like hedges.