Put several cuttings in each pot. You can speed up the rooting time by placing a clear plastic cover over the growing container so the. Growing Mosquito Plant Bonnie Plants Mosquito Plants Plants Mosquito Repelling Plants The standard time for citronella geranium cuttings to form roots is about four to six weeks. How to grow citronella plant from cutting . Growing your own citronella can be a fun addition to outdoor entertaining. If plants become woody by summers end propagate a new plant by taking cuttings from non-woody stems and inserting them in a container filled with lightweight potting soil. Pick up some potted citronella cuttings to keep things simple. Best way to grow citronella is from a cutting You can grow it indoors in water. Dip the cut surface at the end into a dish of rooting hormone and sink it into the planting mix at least three nodes -- the thick parts of the stem where leaves and branches start -- deep. How to Grow Citronella Method 1 of 3. Th...