Most vegetable varieties will have no problem maturing before your first frost date. Annual minimum temperature for zone 5 … With a last frost date of May 15th and first frost date of October 15th. Instead of burying the entire pot, you can remove the plant from its container and replant the perennials … Like lantana, many of the plants we grow as annuals in zone 5 are perennials … Zone 5 Perennials In order to make shopping for your garden easier, we have gathered all of the perennials we offer for hardiness zone 5 here. Remember that this method only works if you have perennial plants that are hardy in your USDA hardiness zone. If you aren't sure about your hardiness zone, click on the link under the search box that says FIND HARDINESS ZONE… However, in zones 9-11, lantana is a perennial and actually considered an invasive plant in some warm climates. A tropical plant won’t survive the winter in Zone 5 just because you buried it in the ground. Plant in Your Garden Bed. To ensure greater success with your garden, choose plants that are rated for the zone … The zones in the U.S. are classified on the basis of their temperatures in winter—the coldest of winter temperatures in Zone 5 may reach anywhere between -20 to -10°F. These dates will vary a week or two so it’s important to watch the weather before planting. Zone 5 has medium length growing season. For example, if planting in hardiness zone 5, the last frost date is generally between April 1st – April 15th, and the first frost date typically falls between October 16th – October 31st. In zone 5, lantana cannot survive the winter, so it does not become an invasive nuisance. These dates will in part dictate when the best time to plant …