The pilot reported that just prior to landing he noted there was ice on the airplane's wings. He activated the de-ice boots and proceeded to land. During the landing flare, about 12 feet above the ground, the airplane buffeted and the nose lowered. The pilot added full power to initiate a go-around when the airplane stalled and the left wing impacted the ground. The pilot reduced power; the airplane touched down onto the runway and skidded off the left side of the runway before it came to a rest. During the accident sequence the airplane's left wing sustained substantial damage. The pilot reported no preimpact mechanical failures or malfunctions with the airplane that would have precluded normal operation.