I have a planter that is FULL of multiple ponytail-like plants and it just keeps producing more and more little bulbs! They look like the usually slow growing ponytail plant, but I'm sure it is perhaps only a distant cousin to it. The planter is about to burst at this time. Also, the leaves turn brown on the ends very quickly. We set it outside in the summer but bring it in for the winter months here in Colorado. How should I be caring for it? Any ideas?