Fresh vs 1 Year Old Mushroom Compost By Martin GardenerDecember 13, 2023December 16, 2023Videos, What's New When can you start using mushroom compost? Does it become better over time? What’s the texture like? These are some of the questions i’ll be answering in the video below. Buy perennial veg, tubers, cuttings and plants on our ONLINE SHOP. You can also support us by becoming a member of our Members Support Community.