Thanks for the input. As i said, i'm a newbie, i didn't even think
about the fact that the stuff to kill weeds would be just as bad as
insecticides. I've been using an organic "insecticide" which contains
canola oil and sesame oil that i spray on the leaves to prevent
caterpillars and such.

So, let's forget the organic thing, even in a non-organic garden Round
Up doesn't actually work without killing the plant?