I started off with 5 now I am down to two. Please tell me how to save my plant. I have had it for maybe 5 years. It is on the stringy side with a few areas of leaves. Some shoots die and new ones come. Too many are dying and not enough new ones are coming. I think I am using the wrong soil, where can I get the right stuff and what is it exactly? Is there a place to buy new ones that don't cost an arm and a leg? I would like to replenish the ones I lost. The plants I have are no more than a foot and a half. Thanx for any advice!