I will take photos tomorrow of the trees and post them. I have had pistache trees on my property for many years and they always stay green full Spring and Summer. The one female that is about seven years old had its leaves turn yellow in June and dropped a lot of them and the green berries turned brown. After aerating and putting in a lot of fertilizer spikes the leaves stopped turning yellow and the green leaves that were left have stayed green and are only turning yellow a bit today. The other pistache trees are very healthy and are dropping yellow and gold leaves right now which is usual for this time of year. The berries on the healthy females should have turned orange but they didn't. I don't remember what the fertilizer spikes were. Understand that my soil may be different than yours because I'm West of Fort Worth on what had been a dairy farm. Right now, typically, a pistache tree should have some healthy green leaves with bright yellow leaves with bright orange areas. Berries would be turning red. If you bought your trees from a good nursery they may be guaranteed for replacement. I get mine at Calloways and keep the receipt. Because yours was planted in April it still could have been damaged by the freeze in February depending on where the nursery was. I have hundreds of trees on my property and so do my neighbors. Many other trees were having issues this summer with some neighbors needing tree surgeons to come out. They were told that the problem was mostly because of the February freeze. The native oaks did well but more ornamental trees were stressed,

The growth rate of a Chinese Pistache is just like any other tree. It all depends on three things: the species, location, and growing conditions. The growth rate of a Chinese pistache is moderate, not fast. I am sorry you were misinformed by the nursery gal. You can maximize the growth rate by watering the tree once a week during drought conditions and by giving the tree a 10-10-10 tree fertilizer once a year. It also helps to place a 3" thick layer of mulch around the tree, but keep the mulch a few inches away from the trunk so as not to promote pests and disease. The Chinese Pistache is a wonderful tree if it is managed properly. The female tree's flowers only produce fertile seeds if there is a male tree close by to pollinate them. Unfortunately, the states of California and Texas didn't learn enough about this tree before they began to mass introduce it. So is the way of all invasive plant species... Just an encouraging note, if this is encouraging. After about 20 years that Chinese Pistache tree you have will develop into a beautiful spreading shade tree and then you will be glad you planted it.

These are great trees in north Texas, but Ken is spot on about dealing with poor weak branching as they grow - this is a characteristic of these trees. Once they get above 20ft or so, they're pretty good about maintaining a nice oval crown on their own... other than trimming the occasional rubbing branches or "whips" that grow out from the bottom of larger limbs. We have a lot of these in our part of Dallas which suffered little, if any, damage from the ice storms last winter that tore up a lot of our oaks. My impression is that any reputation for weakness is more likely due to poor branching that was not rectified when the trees were young. There's also a germ of truth in all of the other objections, so here are some thoughts from our selection and experience with our tree: Invasiveness ("produces seedlings") - A legitimate concern in some parts of the country. Nursery industry has dealt with it by producing cloned males. If you bought your tree from a major grower within the last 15 years, I suspect it's most likely male. This is probably the major strike in the male vs female debate. Seems the strength of any arguments for cutting down established female trees would depend a lot on their locations (urban lot vs natural park space, etc.). Male vs female - Main arguments for female are the berries, which are attractive while on the tree, and less pollen than the males. Main argument for male is no potentially invasive berries - which probably trumps most other considerations. However, male flowers put out a LOT of pollen, so some concern has been raised over risk of increasing problems for those with sensitivity if/as usage of this tree grows. Trashiness - Does not seem that different to me from several other common trees and less than others: pollen is a problem over parked cars, flower/fruit/leaf debris are problems over driveways and pools, etc. Consistency/duration of fall color - Not one you mentioned, but something we've seen. There's a lot of variability among the trees in our neighborhood. Some don't ever reach that vivid red, some drop their leaves within a few days of the color change, and others seem to hold onto a good portion of their vibrant red leaves for weeks. Someone planting this tree for a great fall display could be disappointed... even if the tree is otherwise beautiful. Planting a known named cultivar is not an absolute guarantee, but can improve the odds of good fall color.

Thanks for your replies. The drowning diagnosis makes me confused a bit, since these pistache trees are supposedly great for the Houston area, where it is not uncommon to get heavy rains from time to time. (The tree is in an area with good drainage.) If they were so susceptible to occasional 5" rains, then why would they do well here? And can someone tell me how this was improperly planted, and what I can do to fix? I know our soil isn't the best here, but again, they supposedly are good for this area. I don't know much about trees, but I'd think the experts would plant it correctly...