Ripening prickly pear are sure signs of fall

It's the first day of autumn and we made it through a particularly brutal summer here in San Antonio, so time to look for seasonal changes in the plants.  The traditional fall colors so common in northern climates are rare in South Texas.  After a few days of rain a "cold front" blew in and dropped our daytime highs all the way down to 91F/33C.  I've been outside several hours each day planting and transplanting to take advantage of the beautiful weather.  While we do have a few pockets of maples and a several other plants which will change color this season, our weather typically remains quite warm right up until the calendar says winter.

That doesn't mean we don't have our own signs of fall.

One sign is the ripening of the Tunas or prickly pear fruit of the Opuntia cactus.  In the arroyo across the creek behind the house these are bright red.