Fertile Fibre works very well on a large range of cuttings used in deep trays or plugs. Cuttings root faster with well-formed root systems. 100% is possible with the use of soil warming cables and a good mist system. Mixing with Perlite/Vermiculite, or grit/sand for hardwoods gives equally good results.
For those that don't know Fertile Fibre was developed on a herb nursery called the Cottage Herbery found here, http://www.thecottageherbery.co.uk/ in 1989. The Cottage Herbery went on to win several Gold medals at Chelsea Flower Show all grown organically and in Fertile Fibre.