Populus fremontii var. Carrizo

'Carrizo', This form is for interior plantings only. It will get rust if the climate is too moist. This form is very tough. It should do fine in most desert sites and even into parts of the Great Basin. I'm not sure how hardy it is, but we know this site has ranged from 130 degrees with 5 percent humidity to -4 with no snow, 10 percent humidity and a 20 mile/hour wind. (This area also gets locusts regularly.) The farmers gave up and sold it to Fish and Game. If you are in Barstow and you have water for a tree, this is it! This one I believe is hardy to -20 or -30 F.. A male clone. Plant and stand back, very fast with regular water, on one site 30' in a year. We grow male trees, females have cotton. An excellent shade tree. Keep away from septic system. Do not plant under power lines. Cottonwoods are important bird and butterfly plants. Cottonwoods are amongst the water shunt plants of nature. Use them next to a water source(such as a lawn) to shunt water to the rest of you planting. Cottonwoods will get very shallow roots if you water shallowly. If you put one next to a lawn do not water the lawn daily (you shouldn't anyway), strech the watering out to once a week or so or you will have a bumpy lawn (from the roots).