Read the description, it will usually say best for preserving, or freezing. Choose some vegetables with high nutritive value. The powerhouses in this category are carrots, sweet potatoes, cauliflower, artichokes, asparagus, peas, beans, lima beans, Brussels sprouts, spinach, and broccoli. Talk to neighbors, some veteran gardeners can give very good advice. They have experimented with different varieties and can advise you are many things within their experience.
Some seed is treated for fungicide, which works to keep the seeds from rotting.
A brightly colored chalky substance on the seed distinguishes the treated seed. Some catalogs offer untreated seeds which organic gardeners prefer. Plant untreated seed when the soil is approximately 65 degrees to germinate well. The size of your garden has a great deal to do with what you can plant. Also, the choice to seeds, and time to maturing is a factor.