Their growth rate is similar to English oak. They tolerate clay soils. The foliage is dark green with a silvery underside, and fall foliage is a reddish-bronze. Pin oak is not recommended for most sites in Colorado because it is very susceptible to iron chlorosis. Gambel oak is native to Colorado and is adapted to most soil conditions in our state.
Oaks are generally pest free.
Galls, or round protrusions on leaves or stems, are unsightly but do not harm the trees. No control measures are recommended. Permission is hereby given to duplicate this Plant talk Colorado TM script as is if credit is given to the sources.