Why April Is the Best Time for Pre-Emergent Crabgrass Control in Zion, IL 60099 Lawn Doctor of NE IL / SE WI provides professional pre-emergent crabgrass control in Zion, IL 60099. Right now in April, soil temperatures are reaching the 55°F threshold that triggers crabgrass germination. This is the critical window to apply pre-emergent treatments before crabgrass takes over your lawn. Contact us today to protect your lawn this spring! Professional pre-emergent crabgrass control services in Zion | Photo by Get Lost Mike via Pexels Why Does Your Zion Lawn Need Pre-Emergent Crabgrass Control Right Now in April? In April, Zion lawns are at risk of crabgrass invasion as soil temperatures rise. Pre-emergent treatments work by creating a barrier that stops crabgrass seeds from sprouting. If applied too late, once crabgrass has germinated, pre-emergents lose their effectiveness. The soil in Zion, often compacted from winter, is particularly vulnerable to weed growth this time of ye...