In article ,
Jeff Thies wrote:

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
I don't have a dog in this fight, since I've never used corn gluten, but
the University of Minnesota did say,"Potential problems with corn gluten
meal stem from the fact that extensive moisture and microbial soil
activity can reduce its effectiveness." It has been know for a light
rain to fall in Oregon.
--
- Billy
"Fascism should more properly be called corporatism because it is the
merger of state and corporate power." - Benito Mussolini.
http://www.youtube.com/watch?v=Arn3lF5XSUg
http://www.thirdworldtraveler.com/Zinn/HZinn_page.html