In short, Yes. The fact of the matter is that Winter weed control is essential for Spring Weed managment. Weeds will germinate and sprout an entire season before you may see them! For instance, Henbit, The weed with the purple flower in Janurary and February actually Germinated back in October or November. When ambient soil Temperatures reach 55 degrees in the fall, you have weed germination for most weeds. It is important that we apply pre-emergents a season before you see weeds! The same is true for your Summer Annual weeds such as Crabgrass. We need to apply a pre-emergent in the Winter months to prevent these Summer annuals. As you can see, Lawn Care is essential even in the winter months! The key to a great lawn is consistent care.