Home Gardening Milkwood farms seed raising mix recipe: The mix we use currently to make soil blocks at Milkwood Farm is as follows: 2 parts Coco-peat (comes in a dried and pressed block) 1 part Course sand (washed) 1 part Compost 1 part Mushroom compost (if you can get it ordinary compost if not we use our home made which is not quite as soil like as the commercial stuff) 1 part Worm castings