[header] How to kill prostrate spurge [title] Solarize the soil during the summer months. [step] Solarization is most effective when the sun is at its brightest and the sky is cloudless. Spring is often rainy and the other months are too cool for solarization. 
[substeps] Spurge will usually take root and set seed after 5 weeks of warm weather. If you live somewhere cool and foggy, like some coastal regions, solarization may not work for you.