How to divide a hardy geranium
1 Water the plant well to minimise its shock, keep the rootball hydrated and make it easier to dig up.
2 Using a fork, loosen the soil all the way around the plant, then carefully lever it from the ground.
3 Split the plant either with a sharp knife or spade blade, or by teasing the roots apart with your fingers.
4 Discard divisions that are damaged or have poor root systems. Re-plant the rest at the same depth as their roots.
5 Water the divisions well and add a layer of nutritious mulch to keep the soil hydrated and suppress weeds.
6 Using sharp, clean secateurs, cut off dead or damaged foliage and flowers to keep plants healthy and looking good.