While people may notice extremes in the weather (which are certainly noticeable), they may not notice certain long term changes in seasons (and climate) that plants do. Over millennia, plants have sorts of 'programs' running to keep them aligned with the seasons, so they bloom when pollinators are available, and set fruit after hard frosts would destroy their efforts. That programming can't keep up with the changes in climate. This article, which quotes my maternal aunt, who is a professor and apple geneticist, is a good read.

Climate change is already hurting fruit breeders, and consumers could soon feel the pain

March 28 In Mark Demuth's research orchard in the shadow of the Blue Ridge Mountains, the peach tree twigs glow a soft red-brown under the strengthening late winter sun. The peaches are emerging from hibernation, he says, as he points out which of the stirring buds will open as leaves and which as blossoms come early April.