Image acquired at https://earthexplorer.usgs.gov/ with the following criteria:
Within tile border of leaf-off to leaf-on conditions:
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It only takes a minute to sign up.Sign up to join this community
NAIP imagery is supposed to be collected in leaf-on conditions. What you may be seeing are adjacent plane swaths that were collected during different time frames (late spring vs. mid-summer). Swaths are merged together before being packaged as quarter-quads. If you received a shapefile with your imagery it should contain swath features with the collection dates.
[Disclaimer: I work for USDA, but am not involved in the NAIP acquisition process]