Ask-a-Dave's-Gardener: Need Help Growing Sansevieria, 1 by Janesdf

Janesdf wrote:
Hi,
Last autumn, I purchased four Sansevieria rootings and planted each in its own pot with potting soil. I\'ve never grown these plants before, I love how they look. At the bottom of each are small new leaves, but, they have all looked the same for months. The smallest one in the photo was in another area of my apartment, the first three are in front of a sunny window. I water approximately every 3 weeks when the soil is dry as I was told too much water will cause root rot. Is there anything else I can do to encourage faster growth, especially of the new leaves, or, is this a naturally slow-growing plant?

Thank you. Jane