Of or designating a method of farming or gardening which uses chemicals as fertilizers, pesticides, etc. Cf. organic, adj. 8b.

Applied to methods of growing plants without soil. Cf. hydroponics, n.

Relating to or designating a system of organic farming or horticulture that avoids the use of animal products or by-products.

Of, relating to, or derived from living matter. Of a method of farming or gardening: using no chemical fertilizers, pesticides, or other artificial…