Before choosing seeds from a catalog, you’ll need to know which growing zone you live in. Growing zones, also known as hardiness zones, are based on the average minimum temperatures for each zone. A growing zone map is included in every good garden catalog, making it quite easy to identify your garden’s hardiness zone. Growing zones with higher numbers are in warmer climates, while growing zones with lower numbers are in the north.

For all perennials, biennials, trees and shrubs, catalogs will indicate the range of zones in which the plants will perform consistently. For instance, Blue Fountains delphinium is listed as hardy in zones 3-7. This plant would not be likely to survive a long, cold winter in zone 2, nor would it tend to grow well in the heat of zones 8 or 9.

For best results and the most satisfaction from your gardening efforts, always choose seeds for plants that are hardy to the growing zone you live in. Buy seeds from a reputable company and avoid discounted seeds left over from the previous year. Most seed companies print planting instructions for each seed variety right on the back of the seed packet. By following these instructions carefully and choosing your seeds wisely, you’ll be well on your way to having a terrific garden.