Zinnias are one of the most popular plants in the world, and for a good reason – they’re easy to grow, tolerant of a wide range of climates, and have a host of colorful flowers that can be arranged in a variety of ways. If you’re thinking about adding zinnias to your garden, it’s important to know which zone they should be planted in. Here’s a quick guide to help you choose the right zinnia hardiness zone for your area. Zinnia is a genus of annual flowering plants in the Asteraceae family that can be cultivated in USDA Hardiness Zones 2 through 11.
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Hardiness Zone of Zinnia: Zone 2-11
Hardiness Zone 2
Most of the places in Zone 2 are in Alaska, like the cities of Prudhoe Bay and Unalakleet. But the northernmost part of Minnesota is also in Zone 2b, so if you live in or near Pinecreek, you should look for plants that can survive in Zone 2. In the winter, the average temperature in Zone 2 is between -40°F and -50°F.
Hardiness Zone 3
Zinnia is frost-tender and should be planted in the back of the garden where it will not freeze. Plant zinnias about 2-3 inches apart in well-drained soil that is amended with compost or manure. Water thoroughly and cutbacks after flowers fade to encourage new growth.
Most native U.S. plants are located in Zones 3 through 10, and the hardest species can tolerate these zones. Plants in Zone 3 can endure temperatures between -40 and -30°F. The majority of Zone 3, including the northern regions of Montana, North Dakota, Minnesota, Wisconsin, and Maine, is located in the states of the upper Midwest.
Hardiness Zone 4
Plants in Zone 4 can endure temperatures between -30 to -20°F. This zone can be found in Montana, Wyoming, North Dakota, South Dakota, Minnesota, Wisconsin, and several eastern states, including Northern New York, New Hampshire, and Maine.
Zinnia can tolerate some frost but prefer full sun and regular watering conditions. Space zinnias 3-4 feet apart center plants on a bed of organic matter in well-drained soil with plenty of organic fertilizer added at planting time or as needed throughout the growing season.
Hardiness Zone 5
This is another common zone for states in the Midwest and Northeast, where summers are humid and winters can get as cold as -20 to -10°F. States like Colorado, Nebraska, Iowa, Wisconsin, Illinois, Indiana, Michigan, and New York are all in Zone 5.
Hardiness Zone 6
Zone 6 is right in the middle. This region spans the continental United States from the Pacific Northwest in states like Washington and Oregon to the Midwest in states like Kansas, Missouri, Illinois, and Ohio. Here, temperatures as low as -10°F won’t kill the plants.
Hardiness Zone 7
Extremely rare negative temperatures occur throughout winter here. Temperatures as low as 0°F won’t harm the plants that thrive in Zone 7. This region spans from the Pacific Northwest (Washington and Oregon) to the southernmost tip of the Appalachian Mountains in Virginia and North Carolina (Texas and Oklahoma).
Hardiness Zone 8
In Zone 8, things are beginning to heat up. In this zone, the warm weather is great for native plants. Zone 8 will also start to have a longer growing season for plants. This zone includes most of the South, like Texas, Louisiana, Mississippi, Alabama, Georgia, and the Carolinas. It also includes the West Coast.
Hardiness Zone 9
With hot and heavy temps striking this zone, it’s pure California fantasy. These plants can endure temperatures as low as 20 to 30°F but thrive in temperatures ranging from 70 to 90°F. Zone 9 can be found in California, as well as in Southern Texas, Louisiana, and Florida.
Hardiness Zone 10
Zone 10 has some of the warmest temperatures in the United States, especially in tropical areas like Southern California and Southern Florida. Plants in this zone can withstand temperatures ranging from 30 to 40°F.
Hardiness Zone 11
Hawaii is in Zone 11, which is good for tropical plants. Plants can survive temperatures above 40 to 50°F all year long in this zone. There is no frost at all, and native plants grow well all year round.
Hardiness Zone of Different Zinnia Varieties
Zinnia ‘Benary’s GIant Bright Pink’
Zinnia ‘Benary’s GIant Carmine’
Zinnia ‘Benary’s Giant Coral’
Zinnia ‘Benary’s Giant Golden Yellow’
Zinnia ‘Benary’s Giant Lilac’
Zinnia ‘Benary’s Giant Lime’
Zinnia ‘Benary’s Giant Orange’
Zinnia ‘Benary’s Giant Purple’
Zinnia ‘Benary’s Giant Salmon Rose’
Zinnia ‘Benary’s Giant Scarlet’
Zinnia ‘Benary’s Giant White’
Zinnia ‘Benary’s Giant Wine’
Zinnia ‘Canary Bird’
Zinnia ‘Giant Violet Queen’
Zinnia ‘Golden State’
Zinnia ‘Holi Pink’
Zinnia ‘Holi Scarlet’
Zinnia ‘Miss Willmott’
Zinnia ‘Polar Bear’
Zinnia ‘Profusion Double Deep Salmon’
Zinnia ‘Profusion Double Fire’
Zinnia ‘Profusion Double Hot Cherry’
Zinnia ‘Profusion Double Red’
Zinnia Profusion Double Yellow’
Zinnia ‘Profusion Orange’
Zinnia ‘Profusion Red’
Zinnia ‘Profusion White’
Zinnia ‘Profusion’ Series
Zinnia ‘Purple Prince’
Zinnia ‘Royal Purple’
Zinnia ‘Scarlet Flame’
Zinnia ‘Short Stuff Coral’
Zinnia ‘Short Stuff Orange’
Zinnia ‘Short Stuff White’
Zinnia ‘Will Rogers’
Zinnia angustifolia ‘Star White’
Zinnia elegans ‘Cherry Queen’
Zinnia elegans ‘Macarenia’
Zinnia elegans ‘Magellan Coral’
Zinnia elegans ‘Mazurkia’
Zinnia elegans ‘Orange King’
Zinnia elegans ‘Pinca’
Zinnia elegans ‘Pop Art White and Red’
Zinnia elegans ‘Queeny Lemon Peach’
Zinnia elegans ‘Queeny Lime Orange’
Zinnia elegans ‘Queeny Lime Red’
Zinnia elegans ‘Queeny Orange’
Zinnia elegans ‘Raspberry Limeade’
Zinnia elegans ‘Redman Super Cactus’
Zinnia elegans ‘Salmon Queen’
Zinnia elegans ‘Senora’
Zinnia elegans ‘Senorita’
Zinnia elegans ‘Sungod’
Zinnia elegans ‘Uproar Rose’
Zinnia elegans ‘Zinderella Lilac’
Zinnia elegans ‘Zinderella Peach’
Zinnia elegans ‘Zowie! Yellow Flame’
Zinnia haageana ‘Old Mexico’
Zinnia haageana ‘Soleado’
Zinnia marylandica ‘Double Zahara Cherry’
Zinnia marylandica ‘Double Zahara Fire’
Zinnia marylandica ‘Doubl Zahara Raspberry Ripple’
Zinnia marylandica ‘Double Zahara Salmon Rose’
Zinnia marylandica ‘Double Zahara Strawberry’
Zinnia marylandica ‘Double Zahara White’
Zinnia marylandica ‘Double Zahara Yellow’
Zinnia marylandica ‘Zahara Raspberry’
Zinnia marylandica ‘Zahara Starlight Rose’
Zinnia grandiflora (Plains Zinnia)
Zinnia tenuifolia (Red Spider Zinnia)
Zinnia peruviana (Peruvian Zinnia)