In the northeast when do the days start to become shorter?

Question

my plants react to shorter days longer nights thanks

Answer 1

The longest day of the year is June 21.  The shortest day of the year is December 21.  It doesn't matter where you are at. These are the facts.

Answer 2

The days start getting shorter around the second week in July in the NE US. the Solstice is June 21/22 which is the longest day of the year in the northern hemisphere (and shortest in the southern) but we don't really see much change either way in day length  from around June 10th to July 10th. You won't see the nights getting longer than the days until after the fall equinox in late October

Answer 3

The days are getting shorter right now. They started doing it after June 21, same as every year in the northern hemisphere.