On Mon, 11 Jul 2016 19:27:12 -0400, Don Wiss
wrote:

On Mon, 11 Jul 2016, Brooklyn1 wrote:

The only method I found that works with success
on my long crushed stone driveway is to use a defolient that kills the
roots.... Round-Up works best... a weak solution is very effective
only it can take a week to ten days to see the weeds dying rather than
the 2-3 days with full strength.

I agree. The defoliant I have been using recently at my mom's is Stinger:
http://www.dowagro.com/en-us/usag/pr...icides/stinger

It does take a couple weeks for the Canadian thistle to die down. But it is
working. The problem is I am spot spraying and the thistle is mixed in all
around. I miss some. But then it grows and I find it. I may only have one
more round to do. There are almost none left.

Stinger is a broad leaf herbicide. Or in other words, it won't harm
monocots. I had to buy a quart. Enough for several acres of crops. I've
only used about an ounce. I am going to try spot spraying weeds in her lawn

Don. www.floorborders.com (e-mail link at page bottom).

I try not to harm thistle, the original velcro, I think it's a
beautiful plant with gorgeous flowers... also its roots grow very deep
and aerate the soil. Song birds love thistle seed. Next time
thistles in my wildflower meadow flower I will remember to take
pictures. Some thistles grow right along the base of my barn, I just
leave them, I just try not to get too close or those velcro stickers
get all over my clothes.