The kind of Fungi you want to invite inside. Available in Portobello, White Button or a combination of both. These kits contain everything you need, except the water. The mushroom compost has already been prepared and inoculated with the mushroom mycelium (the fungus). All you need to do is add water and wait for the mushrooms to grow. The first mushrooms are usually ready to be picked within 3-5 weeks of starting the kit.