Just an indication than ripening is commencing, the plant is usin up and discarding the leaves that used to transpire a lot of water. Its main goal will be finishing the buds, constructing the protective cocoon around what would be seeds but are now just unfertilized resin glands. This is when most newer people fuck up, right at the end, but your not gonna fuck up, your gonna wait, I hopeI love green apples!
So they've slowed down a little on the water intake. Used to be water every 48 hours now its about every 3 days. Does that mean something when they slow down on watering needs?