On Friday, June 9, 2017 at 3:44:35 PM UTC-5, Don Wiss wrote:

On Thu, 08 Jun 2017 15:24:48 -0700, mike wrote:

I'm not just spraying 'em, I'm pouring the concentrated
stuff down the crack.

That could be a problem. You are supposed to spray the foliage. Not pour on
the roots.


Pouring a diluted solution works as well as spraying. See my
post about sidewalk cracks.