Zone 3: -40 to -30°FZone 3 plants can withstand cold temperatures of -40 to -30°F. The upper Midwest states hold most of Zone 3, such as northern parts of Montana, North Dakota, Minnesota, Wisconsin, and Maine.
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Zone 2 encompasses areas such as Jackson, Wyoming and Pinecreek, Alaska, while zone 3 includes cities like Tomahawk, Wisconsin; International Falls, Minnesota; Sidney, Montana, and others in the northern part of the country. Let's learn more about the plants that grow in cold climates like these.
Where is Zone 8? USDA Zone 8 spans mainly from coastal Virginia to central Texas, including the entirety of South Carolina, Georgia, Alabama, and Mississippi.
Physiological adaptations are similar as mentioned above for Zone 3, just even more so, especially the ability to clear lactate. Intervals in Zone 4 can really improve your lactate threshold and help you either go faster or closer to your threshold for longer.
Zone 1 is aerobic and uses a higher type 1 muscle fiber and fat ratio for energy. Z2 is aerobic, uses type 1 muscle fibers, and fat for energy. Z3 is both aerobic & anaerobic, uses both type 1 & type 2 muscle fibers, and fat & glucose for energy. This is the zone where lactic acid starts to build up as well.
Because the state is so large, it is actually further broken down into Northern and Southern planting zones. A northern half of a California planting zone can be anywhere from 5a to 10b. The southern region has zones 5a to 11a.