When using Weed killer on grass?

Question

are you supposed to keep it watered???

I heard you should only water your lawn 1 inch of water per week.

It has been raining occasionally and is supposed to tonight.

*I live in MIchigan*

Answer 1

You should use weed killer when it isn't supposed to rain for a while.  This gives it a chance to work into the plant.  Check the label for how long you need to leave it before rain or watering can wash it off.

Answer 2

Use water on fertilizer use nothing on weed killer. As far as how much to water a lawn it depends on how hot and how dry .  Just make sure to water before the sun comes completely up...always before 10:00AM