A gardening friend once told me that a weed was simply a plant that was not wanted in a particular bed or plot. An extreme, if unlikely example: a rose would be a weed in a potato patch.
I am at a point where I accept most of the growth in my yard as equal — I have no emotional attachment to bermuda grass (it ain't naturnal to this region anyway). It's green stuff that grows, most of it gets mowed to be acceptable in this suburban environment. With any luck, that green stuff produces enough oxygen to balance out the damage done by the mower's internal combustion engine.
I'd like to think God looks at creation in the same way.
I like to believe there are no weeds in God's garden.