Wednesday, September 18, 2019

Rakish

We all look forward to riding around looking at the pretty fall leaves in October and November.

Raking them up is not quite so appealing, leading many people to just let them lie there and eventually blow onto my yard.

Whatever your fall pleasure, don't rush out just yet.

The Weather Channel (what did we ever do without them?) says our rich autumn golds and browns will be here a little later this year. Blame the warmer temperatures of September.

And on the other hand, the Weather Channel, the good people who sponsor Jim Cantore's visits to wherever it's really hot or cold or snowy or rainy or floody, says that because it was a wet summer before it became a hot one, the foliage (pronounced "foilage" in Baltimore) will be really, really vivid, unless it gets windy.

Things change first in Western Maryland, where Garrett County Forester Melissa Nash reports that a sugar maple in New Germany State Park "… is telling us fall is just around the corner! If these warm days and cool nights keep up along with intermittent rain we should get some good color this year."

So count on the peak of pretty leaves to hit Garrett and Allegany counties in mid-October.

I have to look this up every autumn, because I forget, but it's photosythesis - your old friend from 7th grade Science class - that begins the process of leaf color change.  From spring until fall, the leaves on the trees make chlorophyll, the chemical that allows a tree to make its own glucose for nourishment. Chlorophyll being green, the leaves are as well - or so it would seem.

Actually, the colors of the leaves in October are the true colors of the leaves! And once they stop being all chlorophyll-ish, gone is the green and here comes the brown and yellow and what-have-you.

The same substance that makes carrots orange (beta carotene) makes some leaves orange, and something called anthocyanin makes them red, and flavonol, which sounds like something from a commercial ("Try Certs! Now with added flavonol!") makes them yellow. 

And nothing about any of these facts will help you rake them. Enjoy the fall!

No comments: