Lin - I had to switch from using sphagnum/peat moss to using pine fines in my ground soil (and also potted plants). Because of the heat and sand here in FL, the sphagnum dries out quickly and when it rehydrates (through watering or brief rain), it tends to pull much of the moisture from the surrounding soil and plant roots. I kept losing plants to wilt and couldn't figure out why until a local nursery explain it to me and suggested the pine fines instead. Something to think about if you live where the soil is sandy.
