Memorial Day weekend is a great time to get summer vegetables started, according to Rock County's UW Extension Horticultural Educator. Mike Maddox especially suggests warm season crops like tomatoes, peppers and eggplants.
Maddox says if there is rain this weekend it might be a good time to fertilize lawns as grass needs nitrogen now to keep it going until July 4. He suggests putting fertilizer on right before, or even while it rains, to help the solution settle. However he advises against weed killer prior to rainfall as it will only "wash away."