Succulent plants can have many issues, some of them are environmentally caused or from an imbalance of nutrients. Others are caused by lack of one or more of their preferred conditions not being supplied.
Still others are caused by insects or diseases, which the plant can't fight off because of being weakened by the way they're being grown; most succulent plants need bright light, at least for several hours a day, or grow lights that will supply the right intensity.
Generally, they have fleshy roots that can rot in soil that holds too much moisture; they absolutely have to have good drainage.
They also don't have the ability to withstand cold temperatures, and hate to be near air conditioners or heat registers in a draft.
They also dislike cold water, or water that is run through a water softening unit.
Here are some visitors questions about their plants, and some suggestions as to what they can try to fix the problem;
Do you have a question for the horticulturist? Ask away!