Many companies sell dedicated "survival garden" seed assortments, but do your homework before you purchase that prepackaged bucket of seeds. Are there enough high-calorie plants in there? Are any of them suited for early-spring cold snaps? You might be better off selecting your own seed for each plant type, and taking into account the soil, weather, pests, rainfall, and especially the frost dates for your area. Your agricultural zone will have a “date of last frost,” which is rarely right on the money, but it’s close enough when working with these frost-tolerant plants. Here are two lists to help you figure out the best plants for your containers, beds, or rows.