The soil needed to plant succulents should be replaced, no matter how fertilized it was. Pre-fertilized soil is not a good choice for sansevieria Cylindrica. How tall do spear sansevieria grow? Some are taller than the saguaro, others have more narrow-leafed leaves and some have very thin foliage. Although a rooting hormone product may be available at your local nursery or gardening centre to help speed up rooting, it is not necessary. Your finger could expose the plant to oils from your skin, which may cause it to lose its coating.