I haven't the faintest idea but maybe use your own personal sense of aesthetics? [ because it is true, mostly they are green and leafy, he kind of wonders (hopes) they are poisonous. that'd be amusing to make his one dear friend here a tea with those. ]

Or at least make sure no one is watching you pull them all out arbitrarily and we'll replace them with whatever we have on the cart. [ he nods behind them where a wooden cart is sitting with an assortment of plants ready to be replanted. ] I will not tell if you don't.

[ also, because he doesn't want to be here for hours on end under the sun. ]