How long to wait for spring dethatch in MN

5169 Views 7 Replies 5 Participants Last post by Deere Jr, Apr 23, 2018

Deere Jr

Discussion Starter · Apr 22, 2018

It's a late spring here in MN. My snow has just melted away. Much of the grass is still dormant, with spots of green here and there.

How long should I wait to do a heavy dethatch? I'll be dethatching with a front mounted rotary broom.

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Deere Jr

Discussion Starter · #3 · Apr 23, 2018

Oops. I should have said that.

The dethatching is part of a smoothing project. I'll be spreading 28 yards of sand in about an acre of lawn to help reduce the bumps. I want to dethatch first.

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Deere Jr

Discussion Starter · #8 · Apr 23, 2018

Pete1313 said:
Ridgerunner said:

spreading 28 yards of sand

Click to expand...

By hand!?
You should wait until the turf has fully awoken and is actively growing. A third of a pound of N/M before de-thatching will help recovery.

Click to expand...

Agreed. Wait for the turf to get going. That will be a few weeks yet for your area. Dethatch, clean everything up, mow as short as possible, add some N, sand, and then time your pre-m for just after.

Ridgerunner - LOL, no not by hand. That would suck. I'll be using a Turfo f12d for the spreading of sand.

Pete - Thanks for the tips. I wondered about the pre-m. I usually use a fertilizer + crabgrass control granular.

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