Clean dresser well, then weather-protect the inside of the drawers. Paint dresser if desired.
Cut then screw on some wood planks to the top of the dresser.
To coordinate with the wood top, screw on some wood toned drawer knobs.
Place a self standing shelving unit on top of the dresser, pushing to one side.
Fill the drawers with gardening gear placed inside plastic containers with clear lids.
Place a garbage can in the desk opening, lining it with a lightweight weed bucket.
Hang a half bucket from rope on the side of the dresser for garbage.
Protect all exposed wood with some kind of weather protectant for longevity. Painting the dresser in an outdoor durable paint will also greatly help!
Position the dresser under some kind of weather protected cover. If completely outdoors, I suggest using a metal filing cabinet instead, as exposed wood will rot quicker.