The U-bar.Remember that applying compost from outside the
garden is unsustainable. The amounts needed for
applying multiple layers of compost are not typically
able to be produced in a garden. Therefore, Ecology
Action recommends applying compost before and/or
during the double-dig only as the initial double-dig or a
one-time application. As you get higher yields, you may
even be able to “pay-back” the borrowed compost to its
original source.
Compost applications will help very sandy or clayey