fer·til·ize 
(fûrtl-īz′)
(fûrtl-īz′)v. fer·til·ized, fer·til·iz·ing, fer·til·iz·es
v.tr.
1. To cause the fertilization of (an ovum, for example).
2. To make (soil, for example) fertile: Compost fertilizes the soil.
3. To spread fertilizer on: used a mechanical spreader to fertilize the lawn.
v.intr.
To spread fertilizer.
fertil·iz′a·ble adj.