A little background… In July, 2018, my wife and I had to evacuate our house due to an approaching wildfire. After 5 days of being away we were allowed back home, fortunately, to an intact home. I did not have an automatic watering system and fully expected to return home to a greenhouse full of dead plants. Surprisingly most of the plants were in decent shape and showed no, or little, signs of stress. I then realized that not all of the plants, even the mounted ones, required daily watering in the summer. Following the 5 day absence I stopped watering daily. Over time I have continued to increase the watering interval. California is in severe drought so I have stretched the watering out to 4 or 5 days. I have an evaporative cooler and a single mister on a timer to keep the humidity up to 40%+. You can imaging that not all of my orchids have appreciated this change in watering. Some have died, some very stressed and declining, but others are doing perfectly fine. I will list the observations I have made. Those doing fine with summer watering intervals of 4-5 days Most Dendrobium … exceptions: moniliforme, hekouense, nakaharae. Gongora Miltonia spectabilis … currently blooming Most Bulbophyllum … exceptions: hirundinis Epidendrum Barkaria Philodota cantonensis Vanda / Ascocentrum Tolumnia Cattleya labiata … 3 sheaths currently forming buds Meiracyllium trinusutum … blooming now Coelogyne kelamensis … new leaves are smaller Barbosella australis … looks better than ever Ancistrochilus rothschildianus Schoenorchis scolopendria Dendrobium bigibbum … currently blooming beautifully Acianthera polystachya Angraecum distictum Lockhartia lunifera Epigeneium triflorum v. orientale Pleurothallis sarracenia Eria aporoides Lepanthopsis astrophora Ornithocephalus Brassavola nodosa Mediocalcar decoratum (in moss) Some that are doing poor Most Pleurothallids … some exceptions mentioned above Restrepia … all look bad, some have died Maxillaria … mixed results Bulbophyllum hirundinis Dendrobium moniliforme, hekouense, nakaharae Cryptotus elatus Coelogyne nitida Zygopetalum maxillare Kefersteinia Paphiopedalum Schoenorchis gemmata Microterangis Zootrophion Aerangis bioloba Aerangis monantha Trichosalpinx chaemolepanthes Gastrochilus japonica Ceratostylus philippinensis Mediocalcar decoratum (on mount) Lepanthes calodictyon … died There are numerous others in both categories. I am not suggesting that anyone else do what I have done but I felt it was interesting enough to share. I eliminated my lawns about 10 years ago and have my landscaping on drip irrigation. Watering my orchids less and shifting to species that can tolerate less water is just another water conservation effort that I’m willing to try.