I have seen this killex treatment you can buy, that attaches to the house to
treat your lawn for weeds. Just wondering how does killex compare to what
the professional weed killing companies use. When the weed man sprays,
they ban you from even walking on the grass for at least a week. That
stuff is especially dangerous if kids walk or play in the grass. Is
Killex just as potent and dangerous for the environment. Or does killex
not have as lasting residual effect? How long after application of killex
is it safe for kids to play in the grass? Second question, how does
killex compare to weed and feed?

I live in the southern Ontario region (Canada).