Drill holes in bottom of drawer. Mark holes for handles and drill holes.
Prime and paint outside of drawer; let dry.
Measure out enough plastic to fit inside of drawer. Put plastic inside drawer and let extra plastic hang over top. Poke holes in plastic to match up to the holes you drilled. Alternatively, you can use latex paint on the inside of the drawer. This helps protect the wood from rotting.
Using your drill, attach the handle.
Pour soil into drawer and spread evenly. Trim plastic (if using).
Begin putting your herbs/flowers in soil. Add soil as needed.
Enjoy your newly made garden and remember to water!