When looking at the different varieties of plants that we offer, you will see that there are “hardy zones” noted. Depending on where you live, can help determine which plants would grow the best for you. Some plants can withstand the cold and some cannot. The zones on the map are based on the lowest temperatures for your area. There are other factors besides temperature that effect the ability for your plants to survive, however, this is a starting point for someone who is looking to start an aquatic garden. The map shown is from the USDA Plant Hardiness Zones listed on their website. For zones outside of the USA, please feel free to reach out to us.