The soil needed to plant succulents should be replaced, no matter how fertilized it was. Never plant sansevieria cylindrica in pre-fertilized soil. How tall does spear sansevieria grow. Some plants grow taller than others, like the saguaro. Others have thicker leaves while some others have thin leaves. Rooting hormone is a product that your local nursery or garden center might have. This can be used to speed up the rooting process but it's not required.