Aloe Vera Propagating
My aloe vera plant had two of original stems rot off from below plant soil mixture. Can I use these to start a new plant?
You can try it, but aloe doesn't propagate from leaf cuttings as well as other succulents. This article will tell you more about aloe propagation: https://www.gardeningknowhow.com/houseplants/aloe-vera/aloe-plant-propagation.htm
The real problem is why did the leaves rot in the first place. In all likelihood, the potting medium did not dry out enough between waterings. This is essential for keeping succulents healthy. This article will tell you more about succulent care: https://www.gardeningknowhow.com/houseplants/aloe-vera/aloe-plant-propagation.htm