A typical carnation cutting/slip should be 10-15 cm long with 4-5 visible pair of leaves weighing about 10 gm should be planted at 5 cm spacing in rooting medium, or grow wool cells.
The rooting medium should consists of one part of peat moss and two part of perlite + sufficient calcium carbonate/lime/limestone to bring pH near 7.0.
The slip cutting should be broken from stock mother plant to avoid spreading of disease through wound or the use of a sterile blade.
A rooting hormone is also recommended to be used.
The cuttings normally are fully rooted in 21 days