DutchMaster APS 5-LITERS Taking cuttings can be a difficult process for gardeners, especially when their rockwool isn't properly conditioned. Dutch Master's A.P.S. is a ready-to-use soaking agent that perfectly prepares rockwool to successfully accept newly taken cuttings, giving gardeners the results they want. When used as a foliar spray, A.P.S. also allows cuttings to grow while rooting.