How to grow rosemary from cuttings Grab some rosemary from the supermarket remove most of the lower leaves so you have a clean length of stem. Use a sharp knife to cut off the base of the stem just below a leaf node, the point from which the leaves grow. Dip the stem ends in rooting gel to speed up the rooting process. Fill pots with a gritty compost mix. Insert several rosemary cuttings around the edge Keep them moist but not wet. Place pots in a cold frame, in a sheltered, shaded area, indoors