[Belgianbillie]

I've already put down pre-emergent.

What if i add aerify plus to the lawn now... will it still work? Will it break up the barrier? Will it sit on top of the barrier?

Perhaps i should just not use it this year, store it for next year and core aerate in fall.

 

[thegrassfactor]

It will have no effect on your pre emergent nor will your pre-emergent affect it

 

[probasestealer]

It will have no effect on your pre emergent nor will your pre-emergent affect it

You can spray as much as you can afford. It's mechanical aeration that will break the barrier

 

[Ridgerunner]

The application of HA is a rather recent procedure. Studies of its interaction with other chemicals are not comprehensive. Although I haven't seen any study reporting a detrimental relationship between HA and prodiamine or dithiopyr, at least one study found that HA applications, within days, significantly reduced the amount of atrazine in soil directly proportionate to the amount of HA applied. In all things, best to be a bit conservative. It's seldom true that if a little bit works, a whole lot should kick [email protected]@.

 

[thegrassfactor]

The application of HA is a rather recent procedure. Studies of its interaction with other chemicals are not comprehensive. Although I haven't seen any study reporting a detrimental relationship between HA and prodiamine or dithiopyr, at least one study found that HA applications, within days, significantly reduced the amount of atrazine in soil directly proportionate to the amount of HA applied. In all things, best to be a bit conservative. It's seldom true that if a little bit works, a whole lot should kick [email protected]@.

The organic acids will react with herbicides, especially if low pH. 2nd season mixing the two on ~70 acres (HA & prodiamine). No noticeably I'll effects