On Fri, 19 Mar 2010 17:03:03 -0000, "Tahi"
gently dipped his quill in the best Quink that money could buy:

Do glyphosate based weedkillers only affect green tissue? In other words can
I carefully spray the ground elder without seriously affecting the big
mature tree paeony growing in the middle of it?


Glyphosate will attack most things it touches.

Spray carefully to avoid damage where you do not want it. Spot spray
if you can.

Dont spray in windy conditions
Dont spray on hot days ( whatever those are !) as it can rise with the
effects of heat.

I can't see it translocating to roots on a mature tree to cause a
problem.

Mike P the 1st