Make repairs to sprinkler heads and test irrigation system.
Prune broken, damaged, or diseased limbs off trees
Wait until the end of May or early June to apply fertilizer
Get a soil sample and a fertilizer plan
Look for signs of snow mold damage. Rake up area, top dress and seed
Look for signs of voles - these usually indicate a grub problem
Crabgrass pre-emergent control should be applied when soil temperatures reach 55F, typically in early May. This year we will most likely need to do this a little earlier, but not before the first mowing.
Re-seed bare spots or top dress entire lawn and over-seed
Aerate your lawn
Sharpen the blades on your lawn mower.