Right now, you can plant onion sets, radishes ,lettuces, potatoes, and other cool-weather crops. Just make sure that they stay watered.
Wait until at least mid-May for your tomatoes and other warm weather vegetables like peppers, cucumbers and corn.
We also like to put a cup or so of compost in the holes and fill them with water when planting the tomatoes, peppers and cucumbers. Then, make sure that you also have supports for them in place. It is better to do it now than to wait when they are already needing the supports to grow.
In other parts of the country, many people are already harvesting, but we live in Zone 4 and can get more freezing nights up to mid to late May. So rather than let your little plants freeze, it is better to wait until the ground has warmed up to prevent their being stunted which will lead to very bad results. Trust me.
I will add more to this gardening how-to later in the week. But, for now, remember you can plant part of your salads....radishes, lettuces and onion sets.
Have a great week!