Here is my new, favorite growing medium: Hydro Fiber Foliage Mix (HFFM) made by Jolly Gardener.
I grow flowers and vegetable in the ground and in pots. But this year I am using a new soil-less growing medium that is a blend of Canadian peat, pine bark, perlite, and hydrofiber. This fiber is specially processed (shredded) pine that loosens the mix, improves drainage and yet retains water.
This blend is the lightest weight “soil” I’ve ever used. The weight is irrelevant, the way it behaves and the way the plants respond is remarkable. When you water, it does not puddle but drains right away. But then it holds just enough water so that roots plunge into it profusely.
I’ve used in in 10″ pots, seed trays and 15 to 25 gallon pots where I grow tomatoes and peppers. Although this media is called foliage mix, it’s fantastic for flowers and vegetables.