Plant Hardiness Zones. Plant hardiness zones help gardeners understand which plants will most likely survive at a location. It is important that your plants can thrive year-round, surviving extreme temperatures. Note: Zone maps do have shortfalls; if the information is inaccurate, you may live in a microclimate.
In normal years, colors peak in the first week of October on the U.P., the second week of October in northern Lower Michigan and the last two weeks of October in southern Lower Michigan. When the colors do peak, here are some of the best bets for fall foliage viewing from Pure Michigan:
Best Answer: September 23 but I always thinks that it's fall when it starts getting cold but that's just wishful thinking on my part. While fall starts on September 22 or 23 on the calendar, Meteorological Autumn actually varies due to several conditions, such as, temperature, moisture, and sunlight levels. Areas of northern Minnesota, northern Maine, and the upper peninsula of Michigan can start seeing Autumn like conditions as soon as September 1.