Nature Calendar, more than four seasons, a guide to wildflowers, wild food, and wildlife activities with 19 distinct seasonal transitions

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					Adjustments


			Rule of thumb: spring moves north at about 15 miles/day, and up in elevation about 100ft/day. Reverse for calculating advance of autumn events. Temperature differential on average is 5.5 degrees for each 1,000 ft. of elevation. Global warming has allowed some plant species to extend their range northward over the last 30 years. It has also made my calendar a little more complex. Some plants are more sensitive to temperature than others in triggering seed germination, flowering, etc. So these will appear ahead of the others shown for that season. I have begun to incorporate these changes, but that is still in process. Timing for many events is also affected by local conditions of temperature, moisture, exposure to wind and sun, etc. Gage season by “indicator species” which I have shown in blue in plant lists. Plants with an asterisk tend to be especially influenced by these factors and so may well be out of sync with their “season mates.” Those plants shown in purple are items of special interest.

Last Updated: July 26 2009