As a summer annual, spurge is the weed I hate the most. At least it does not have big yellow flowers. I compared: left to right: Drive plus both T-Zone and Speedzone, Drive plus Speedzone, and Drive plus T-Zone. The differences were small, but I thought Drive plus both Speedzone and Speedzone was the most effective. The Drive solution included MSO as surfactant. The treatments were applied one on top of the other--not mixed together. Spurge does not roll over and play dead--no twisting and curling like dandelions. Late in the season after herbicide sprays, it just looks slightly brown and dull. Spurge is better sprayed much earlier in the season--probably when growth and expansion is rapid--estimated to be about mid-July. In the fall, seed is produced and growth is slow, due to cool nights. Frost for this location in Michigan is about a month away.