Can You Apply Crabgrass Preventer On Wet Grass?

The peak time for crabgrass to proliferate is spring, when it germinates. So, if you recognize it growing, you should take action quickly. 

Now, a crabgrass preventer won’t prevent the germination process, but it will stop the growth of the roots, ensuring that the grass grows over it and kills it. That’s why spraying it at the right time is imperative. 

But, can you apply crabgrass preventer on wet grass? That’s what I’m here to answer, so read on…  

Can You Apply Crabgrass Preventer On Wet Grass? 

When Is The Right Time To Spray Crabgrass Preventer? 

1. Blooming Of Forsythias And Dogwoods 

Forsythias are bright yellow flowers that bloom around the middle of March until mid-April. They signal the onset of spring, which is also a cue for you to cease the spraying of crabgrass preventer. 

In case you don’t have forsythias around or aren’t sure what it looks like, you can observe dogwoods instead. These have white flowers that bloom from March to May. 

2. Rising Soil Temperature 

Once winter ends, the temperature begins to rise, which is also when crabgrass begins to germinate, as I mentioned earlier. The moment you feel the nip in the air disappearing, start checking the temperature of the soil. 

When the soil reaches 55°F, it becomes an excellent ground for the germination of crabgrass. Thus, when you get a reading of the said temperature or more, spray crabgrass for three days straight around two inches deep in the soil. 

Note that soil temperature can vary in sunlit and shady areas, so be sure to check your soil thermometer accordingly. 

3. Nearing The Month Of February 

Since spring doesn’t commence around the same time every year, you need to keep a track of the spring calendar. However, I mostly notice warmer days rolling by around February or March, which is also when weeds start proliferating. Thus, this is a good time to clip an infestation in the bud and spray some herbicide. 

Thus, a warm spring is an ideal time to spray crabgrass preventer. I, additionally, recommend spraying it before a rain forecast so that the herbicide mixes with the water and percolates the soil. 

Crabgrass Preventer On Wet Grass 

In case you sprayed some herbicide after reading about the possibility of rain, and it didn’t end up raining, fear not. Water your lawn up to three days after spraying herbicide, and you’ll be fine. 

As for crabgrass preventer application on wet grass, you can do that because the liquid herbicide will percolate into the soil with the water. However, avoid spraying granular crabgrass preventers on damp grass because the chemical will end up stuck on the moist leaves. This means that the herbicide won’t reach the soil and thus, will be rendered ineffective. 

Final Thoughts