I think I am going to disagree with a lot of you here on #1 . I'm not sure I have ever seen garlic-mustard, so I can't be sure it looks like that or not, but in some of the photos I looked up just now, it looks different. Of
course, using common names makes it all the more confusing. My first thought was orach (a kind of chenopodium -- related to lamb's quarter or pigweed). Not the red orach, but one of the larger green varieties. Not sure, but it does look a bit like it. Are the leaves fuzzy at all on the undersides?
On #2... That one does look somewhat like okra -- especially the veining and the stems -- but the leaf shape looks a bit more like a squash. Most of the okra I have seen has deeper cut leaves (a lot like marijuana leaves actually -- I know because the pot helicopters buzz our
garden every year to take a closer look!) If this came up near
compost, I would think it was a squash or gourd of some sort for sure. Loofah?
#3 is some sort of wild lettuce, I think. There are 50+ species of Lactuca, so figuring out which one it might be could be tricky. (My first thought was Lactuca biennsis, the blue lettuce, but that is only a guess.) They pretty much all have those deeply serrated leaves that clasp the main stem (though a few are more rounded). A lot of them -- like prickly lettuce -- have sharp, tiny spines on the undersides of the main rib on the leaves. If you tear through a leaf, you will see a milky sap (thus the name lactuca). Most are edible, but really not very palatable even with several
water changes. Very astringent/bitter like poke and
dandelions!