So it has been a couple months since I last wrote anything and this spring has been a wet one. As I write this we are way above average on rainfall this year in St. Louis. It seems like it has been raining every other day. The rivers are busting out of their banks and the ground is saturated.
What this means for your lawn:
The grass is growing extremely fast and it is probably very difficult keeping it cut between rains, but it is very important that the grass gets mowed before it gets out of hand. Cutting too much off a lawn can damage it and cause disease and fungus problems.
The soil is so saturated that the surface cannot dry out. This can also cause disease and fungus problems. There is no need to water yet this year. The rain has provided more than enough water for your lawn. I have seen some places watering and this over watering can drown your grass, wash nutrients away and cause disease in your lawn.
All of this rain has probably washed a lot of nutrients out of the soil. So testing your soil would be a good idea and you may want to consider adding any missing nutrients back to the soil.
Weeds are exploding right now and there is still time to get those under control. Using a selective herbicide will kill the weeds and not the grass.
If you have some bare patches in your lawn there is still time to seed. The cool temperatures has made seeding difficult early in the spring. The ground is still ripe for seeding