I think they probably all do, but the "Multicote" looks most suitable. They are "controlled release fertilisers", which just means the soluble salts are encased in a resin shell, which is slightly permeable. The thickness and permeability of the shell is altered to give different release periods (1st one looks like "6 months"), and the fertiliser mix is altered for different types of plants, high nitrogen for bedding plants, lower for shrubs etc.Do any of the bellow qualify as alternatives for osmocote?