- improve compost
- condition the soil : Peat moss is ideal for improving the texture of the soil, and when added to garden soil it will stop nutrient runoff from occurring by holding water and nutrients in soil.
- Adding peat moss to clay soils can help break down clay by aerating it and applying peat moss to sandy soils will help bind it and retain nutrients rather than leach them.
I was told by a cactus experts that he used the peat moss and pumice (volcanic rock) when he seed the cactus. That would increase the survival rate of the baby cactus. But the peat moss would be dry quickly so you should often water the cactus with peat moss.