It can be a very difficult plant to establish after cutting for propogation. I have a bit growing in my tank and when I cut it for propogation it usually takes several weeks before it starts showing any signs of producing new offshoots. Additionally, this plant is very susceptible to nitrate deficiency. It is just as bad if not worse than micranthemum umbrosum for showing nitrate deficiency. But since it is not as prolific as m. umbrosum it will usually die off quickly if you don't have it well established. Once it is well established, you can usually expect a new leaf every day or two from each runner if it is growing well.