Billy wrote:
In article
,
Higgs Boson wrote:

On Apr 22, 8:25 am, Billy wrote:
In article ,
Jeff Thies wrote:

I put down a lot of bricks and stones last year and I'm getting a lot
of weeds in the cracks. Much of this is away from desirable plant life
so I don't need a specific solution.
(Not sure who wrote this)
I've heard vinegar and a preen follow up. I know nothing about Preen
and I suspect it's the acidity that works in the Vinegar.
I never heard of Preen, so looked it up on-line. Says it is a
combination
of mulch and pre-emergent herbicide.

They don't give the formula.

How can a pre-emergent herbicide be safe for food products?

Any info out there?

Persephone

Corn gluten is also a pre-emergent for anyone who cares.


Apparently Iowa State does:

http://www.hort.iastate.edu/gluten/?

Instructions he

http://www.extension.umn.edu/yardand...lutenmeal.html
http://goorganicgardening.com/weeds/...th-corn-gluten

Oregon State says it doesn't work:

http://extension.oregonstate.edu/new...toryType=garde

Jeff