These trees are native to Australia. We have been planting Australian bottle trees here in the Las Vegas Valley since the 1980’s. Doug offered to help with your bottle tree questions.  Att: Bob Morris…That was a great answer to the Bottle Tree query about watering. I grow Bottle trees……I am happy to assist with any queries you may have with Bottle Trees. My site is:  www.bottletrees.info  Regards, Doug Sowerbutts. Bottle Tree Plantations PH: 0412 222 535 Email: [email protected] Website: www.bottletrees.info