This is the second Supermoss Heirbloom block I have purchased and I love. They both were very similar but different for they were being used for different types of plants. This one is wonderful perfect combination of medium to keep my plants healthy from seeds to transplants. I do not thinks I will be using any other brands anymore. Much easier to carry and ship and very simple to use. Just add water, allow to expand, and plant your seeds or plants. Very light and easy for the roots to expand in as well as plants are very healthy looking compared to the ones I put in a different brand. I recommend this to all flower, veggie and tree planters.