My guess: Tissues that become brittle and crack and stems that develop hollow sections are often seen together and a sign of a nutrient deficiency. Since the macro-nutrients are mobile in plants (except Ca; and a Ca deficiency would be manifest in newly forming tissues) it's probably a micro-nutrient deficiency, most likely boron - (split leaves are a noted symptom of boron deficiency in many plants). To correct (but not repair existing damage) use a fertilizer that contains the minor elements or find a supplement manufactured specifically to supply them. Al

I was linked to your post because I was trying to identify the COT. My grandmother had one while I was a child and for some reason the only name ever said around it was Christmas Cactus which is thornless. I am trying to get into gardening (horrible history of having a black thumb) and wanting plants that remind me of my green thumb grandmother that passed away a year ago. I always loved the "wicked bush" and it was not among the plants that she had at her home that we are still getting plants from, many of which she had on the farm that she raised my mama in. So I asked if anyone had any ideas and continued looking at plants and found it was a COT. I had no idea there were so many colors available. My grandmothers was brilliant red. Thank you for sharing you're gorgeous collection.

Fertilization will depend a lot of whether you are growing Indoors or out. Outside during the growing season I usually use about a half mix of the recommended dose with an all-purpose fertilizer every 4 watering or so... If I remember to do so, that is. I have grown Sanseveria in a number of places and atm I have three doing well in a not too well lit southish window In my bedroom. Honestly, these really only seem to need watering maybe once a month. They look nicer with more neglect for some reason. The aloe you should judge based on how the leaves look and feel. A happy aloe will be plump and green, with its leaves standing up or out. Floppiness, turning red or yellow can be a sign of underwatering or too much light. Turning brown can be overwatering, frost or sun burn and should he approached with caution. Both can and will grow back from healthy roots in case of a freeze.

MRJoss, Mine is doing something similar. I brought it home from Calloways about a month ago and left it in a similar light setting to what they had (low) to acclamate to the house. It started as a small brown spot that expanded quickly. The same thing is starting to happen to multiple leaves. I haven't overwatered it or fertilized it. It is very ugly now and too many leaves are effected to remove them and have a substantial plant left. I'm going to try to return it. This bottom of this article refers to the problem: http://www.ourhouseplants.com/plants/sansevieria . All of the other plants purchased at the time are doing great - multiple succulents and cactus, a dracaenas, a pothos, and several ferns.