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Any deciduous tree outside of the tropics will have some degree of color change or lose there leaves. Anywhere north of central Florida (being very conservative here) will have days that are short enough to trigger some sort of change.
Broadleaf evergreens in the south and west will not lose there leaves, but those trees would die very quickly in the northeast or Midwest. Some deciduous here in SoCal will stay semi-evergreen or they will lose there leaves in January, only to sprout new ones in February. I assume the same can be said for most of Florida.
Any deciduous tree outside of the tropics will have some degree of color change or lose there leaves. Anywhere north of central Florida (being very conservative here) will have days that are short enough to trigger some sort of change.
Broadleaf evergreens in the south and west will not lose there leaves, but those trees would die very quickly in the northeast or Midwest. Some deciduous here in SoCal will stay semi-evergreen or they will lose there leaves in January, only to sprout new ones in February. I assume the same can be said for most of Florida.
Define Southern US, because "all" is sure as hell not accurate.
I said southern US tier; within the Sunbelt latitudes. The climate in those latitudes and southwards, especially along the coasts, is just too warm year-round for deciduous trees to behave as they do in the north. In the Eastern US, along the coastal Southeast, deciduous trees often behave as semi-evergreens, meaning that they either keep their leaves all winter, then loose them for a short period before the new buds, or keep their leaves all winter unless the weather becomes harsher.
Deciduous trees in much of the South are a relic from the Ice Age, when the climate was colder, to the point that the ranges were pushed South. They will eventually be replaced by broadleaf evergreens.
Autumn color peaks in northern Minnesota, Wisconsin, and the UP of Michigan in mid- to late-September; the Northeast doesn't see color until later than that, generally.
Color also peaks earlier in the Rockies than on the East Coast, especially in Wyoming and Montana.
Autumn color peaks in northern Minnesota, Wisconsin, and the UP of Michigan in mid- to late-September; the Northeast doesn't see color until later than that, generally.
Color also peaks earlier in the Rockies than on the East Coast, especially in Wyoming and Montana.
The third weekend in September is considered prime Aspen-viewing time in the central Rockies of Colorado. Color does proceed north to south here.
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