unusually exuberant foliage this spring. causes?
1) The exceedingly mild winter (no true freeze, not one, where I live in Atlanta)
2) the continuously moist conditions.
These might be causes of the extraordinary leafing out this spring.
I'm wondering if high CO2 might be another cause. Plants love that. (In the recent reporting about the milestone recorded in Hawaii, there was also a note that the parts per million will now decline seasonally as the leafing out in the Northern Hemisphere gets going.)