Why are my aloe plants flopping over?
So your Aloe stems flop over; not good. Perhaps some of its cultural requirements are not being met. Aloe plants indoors do best in a full sun position for at least 6 hours a day. When watering, do so thoroughly, wetting the soil all the way through, and toss the excess water so it does not stand in a wet dish. Now let the soil dry completely before watering again. In the winter, water only enough to keep leaves from shriveling. Your plant will also appreciate a move to a cooler spot in the winter, but never below 50 degrees F.
The plant may flop if its stem is weakened by lack of light. In this case you will most likely also notice elongated foliage. If you don’t have a southern exposure window, artificial light is helpful and is used indoors by both professional and home gardeners. Even our orchid curator, when first growing plants in his garage (numbering 2000 orchids plants), used supplemental lighting over his growing tables. Aloe light requirement is 1,000 footcandles. Supplemental lighting can be supplied by placing the plant about 8" under the light tubes. Foliage plants need 12 to 14 hours artificial light daily (flowering plants need 16-18 hours). Here is a helpful link regarding the proper use of artificial light:
If the plant stems are soft or mushy, your plants may have a fast spreading fungal rot that results from excess watering and humidity. Pay particular attention to the watering guidelines above. If the problem does not resolve itself, you will need a more aggressive remedy. You may remove infected areas, spray with fungicide and repot the plants in fresh soil. Alternatively, you may wish to start fresh plants from healthy offsets.
Courtesy of the NYBG Plant Information Service