Regular potting soil will do for raised beds, but the best raised bed soil will be high in organic matter and have high water-holding capacity.
While outdoor soil may be heavy with clay, too sandy, low in organic matter, or on top of caliche, soil in a raised bed can be composed of whatever the gardener desires. Gardening with raised beds gives the gardener ultimate control over the soil mix in the beds.
Filling a raised bed with bagged potting soil is an option. However, using potting soil, especially the premium, is going to be very expensive. Very cheap potting soil often contains lots of sand and other undesirable elements, and is very low in organic matter. It will need to be amended. This defeats the purpose of creating the best soil mix in the first place.
Mel Bartholomew, creator of the square foot gardening method, uses three components in his raised bed soil. Mel’s soil is 1/3 compost, 1/3 peat, and 1/3 vermiculite. Plants can be grown in pure compost, and it’s especially good for starting seedlings. Peat and vermiculite provide excellent moisture holding capacity.
Utilizing backyard soil can cut down on initial costs of soil mix. Soil can be mixed with 1/3 natural soil, 1/3 peat, 1/3 compost. Another possible recipe is 1/4 natural soil, 1/4 peat, 1/4 aged manure, 1/4 compost.
The above ingredients can be mixed and matched, along with yard soil if desired, to create a nice soil mix for raised beds. Keep the organic matter (manure and/or compost) high, and plants will be vigorous and healthy.
With the endless passion for organic living, I - Ann Sanders has come up with the idea of creating A Green Hand. Being the founder and editor of A Green Hand, my goal is to provide everyone with a wide range of tips about healthy lifestyle with multiform categories including gardening, health & beauty, food recipe,...