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Mist heads have a couple issues. The clog easily and also blow all over in the wind. Not easy to get the water where you want it most will be lost quickly to evap and wind. A spinning micro sprinkler on the other hand throws larger droplets and goes in a large radius. 1 of those on a 6 or 8ft high sprinkler riser can toss a 20ft+ circle. And they are adjustable.Watering down plants in the super heat and sun WILL NOT burn them contrary to what some people may tell you. Hosing down plants on those crazy hot days is the best thing for them. You can see them perk right up almost immediately. If your goal is wet below the plants then just use the micro sprinklers on a short riser. Dripdepot.com has all kinds of goodies.
We have very low humidity and it's not a problem for any fruits that I grow. Also, my greenhouse is very dry during the day and that's not an issue either.Mist into the air is a terrible waste of water and doesn't raise humidity that much. It just blows away. You can't humidify the whole yard. It's just a waste. Especially in Southern CA facing decades of drought I don't see this as a good plan.You can cool things off with shade cloth. You can raise humidity with a greenhouse if managed properly. I like my greenhouse as dry as possible because that eliminates all disease issues and makes sweeter fruit.If you have plants that really need high humidity then get a humid greenhouse. Those plants aren't suited to outdoors in a dry climate facing constant water issues.
I installed a misting system for those 110+ F days with single digit humidity. It's a simple setup with 160 PSI misting pump from Mistcooling. It'e been setup since 2018 and still going great, I only had to run it a few days a year. Pump and misters are automated and I can turn them on online. Slip-loc connectrors allowed me to install nozzles where I want them, I belive Wong Farm uses misting systems within tree canopies when they hit over 115F. Here are some pictures when misters are turned on and the pump. Pump is probably don't needed if pressure is high enough but mists are very fine with the pump.
Main line is about 90’ long, I installed misting nozzles every 4-6’ depending on tree locations, so about 16 or so total. I installed it only in the south end of my property where trees get full afternoon sun in summer. Misting line is off of a whole house carbon filter (7 gpm GAC filter from Lowes, GAC filter is for irrigation line only). With 160 psi misting pump, it has enough pressure to cover other sides of the property if needed. Misting line is controlled by Rachio 3 and pump is controlled by a smart plug. This is in addition to in ground sprinklers and mushroom bubblers of course. Misting system is to add some humidity and lower ambient temp a little during hottest days. I didn’t encounter clog nozzles much probably due to water quality, drain valve to drain the line when not in use, plus 160 psi pump helps to keep the nozzles open.
Yes, it controls orbit drip master valve, this modular valve allows me to add as many valve as needed. Orbit DripMaster 67790 4-in-1 Drip Irrigation Valve https://smile.amazon.com/dp/B0040QPGG8/ref=cm_sw_r_cp_api_i_TS6QDWD82DCG1CHB3QV0?_encoding=UTF8&psc=1
You can tell from the pic below, this lychee is directly under a nozzle and no visible salt mark or any mark in that matter. It will also depend on your water quality, if you have hard water >200 ppm carbonate, there might be some visible salt buildup on the leaves.
Main water line to orbit, orbit to 3/8” line to pump, pump to mister main is 1/4” with 3/8” to 1/4” reducer. Adapters are included with pump kit. Once installed it is pretty much a solid system. Tubing are UV rated and no visible damages after almost 4 years in direct sun.