[Yorkie]

Logic says it would be OK.

Not sure I'd have the guts to do so, though!

[Nikkithefoot]

is it safe to compost marestail and bindweed as long as no roots go in?

I would not put those two anywhere near my compost, shoots or roots, far too risky in my opinion. Burn or drowning or the local tip. Having spent the last 3 years digging out bindweed roots I am not taking any chances as I am now nearly on top of it.

[wil4025]

I wouldn't compost anything weeds unless I chop off the green leaves, they are ok. I compost everything from kitchen thats green, grass, green growth, leaves. There is so much to compost, at least you know its weed free.