THE PRESENT INVENTION IS TO PROVIDE MEANS OF PROVIDING A COATING MADE OF SYNTHETIC SUBSTANCE. PREFERABLY THIS SYNTHETIC SUBSTANCE IS AN AQUA-GEL OR HYDRO-GEL. THE PRESENT INVENTION PROVIDES GOOD GROWTH OF MYCELIA ON FRUITING SUBSTRATES SELECTED WITH REDUCED CONTAMINATION. THE METHOD IN THE PRESENT INVENTION RELATES TO A METHOD FOR PREPARING ALGINATE ENCAPSULATION MUSHROOM MYCELIA.