Hi Warsaw,
Great advice from Tomboy. To tell if your soil is too wet to plant, take a handful of soil, gently make a ball in your hand, poke the ball with your finger of your other hand. If the ball falls apart in small clumps, it's dry enough to plant. If the ball stays intact but you just make a depression, it's still too wet.
As to what veggies can go into the ground when, take a look here.
http://www.explore.cornell.edu/scene...0a%20Vegetable
http://www.urbanext.uiuc.edu/veggies/
This should also be helpful.
http://www.savvygardener.com/Feature...egetables.html
Newt
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.