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Should I fertilize before or after overseeing?

Posted on 8/15/25 at 11:47 am
Posted by jlovel7
NOT Louisiana
Member since Aug 2014
23789 posts
Posted on 8/15/25 at 11:47 am
Getting ready to bring my grass down this weekend and then do a pass of aerating and dethatching to prep for overseeing next weekend. Temps are coming down to 60-80.

Should I fertilize first, or after? I’ve seen suggestions both ways.

Once the seed is stable enough I want to put down a fall pre emergent to handle any cold weather weeds. Especially since this is my first year with the house.
This post was edited on 8/15/25 at 11:48 am
Posted by Art Vandelay
LOUISIANA
Member since Sep 2005
11400 posts
Posted on 8/15/25 at 2:08 pm to
quote:

Temps are coming down to 60-80.

must be nice

I would say after but I’m not an expert. The few times i overseed I didn’t do shite and it looked good.

quote:

Once the seed is stable enough I want to put down a fall pre emergent to handle any cold weather weeds. Especially since this is my first year with the house.


Make sure this won’t affect the overseed.

What are you using to overseed and what are you overseeing over?
Posted by bkhrph
Lake Charles
Member since May 2022
324 posts
Posted on 8/15/25 at 4:34 pm to
I would think if you fertilized closely around the time you seeded, you might get fertilizer burn.
I would think that the “new lawn fertilizer” blends would be less likely to do so, it is a legitimate concern
Posted by jlovel7
NOT Louisiana
Member since Aug 2014
23789 posts
Posted on 8/15/25 at 4:51 pm to
quote:

would think if you fertilized closely around the time you seeded, you might get fertilizer burn. I would think that the “new lawn fertilizer” blends would be less likely to do so, it is a legitimate concern


I was thinking of fertilizing 2 weeks after seeding.
Posted by good_2_geaux
Member since Feb 2015
794 posts
Posted on 8/15/25 at 7:22 pm to
where are you located?
Posted by jlovel7
NOT Louisiana
Member since Aug 2014
23789 posts
Posted on 8/16/25 at 7:09 am to
Northern Shenandoah valley VA
Posted by notsince98
KC, MO
Member since Oct 2012
21302 posts
Posted on 8/19/25 at 9:00 am to
you can wait. The seed has all the food it needs to get going and fully germinate. It is a waste of nitrogen to put it down before the grass can use it.
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