So to recap, you’ll need the controller, a solenoid valve, and an inline filter to remove sediment and protect the mist heads. You will also need one solenoid control valve for every unique irrigation use or area.
If this is intended for larger plants then you can get regular sprinkler heads of course. So if you’re setting up a seedling irrigation bench, then I’d go with mist heads because they produce a fine mist that won’t push seeds or soil around. You’ll want an inline filter for any small orifice emitters like mist heads. Very versatile and allows you to get a lot of utility from one controller. And another program can be for a mist bench where it comes on at 8 am, turns on for 9 seconds, then turns off for 9 minutes and repeats until 9 pm that night. Another program can control a different valve every day starting at noon, coming on for 30 seconds and cycling every 30 minutes. One program can be set to water once a week on saturday at 4 am for 3 hours. The only difference between them is one is a 6 station controller which means you can set 6 different programs for 6 different valves, and one controls 4 valves. Make sure you get one that specifically says it operates in seconds, generally there will be an “S” to designate it as capable of seconds operation. Those controllers are specifically propagation controllers and what makes them different is that you can program it to operate in seconds. They also have an almost identical version that’s a different model number Galcon 8004 AC 4S. Galcon 8056S AC-6S 6-Station Indoor Irrigation and Propagation Controller which is $76 as of the time I am typing this blog entry. I’ve gotten a couple questions in this vein, so I figured I’d answer with a blog post to give the broad strokes for you guys. For now though, I have all the components listed that are discussed in this Expert Council episode of The Survival Podcast.
We will link to videos and build this blog post as time goes by. This will be updated and expanded with affiliate links to products you can easily purchase on Amazon. The controllers used enable you to propagate softwood or semi-hardwood cuttings, keep flats of seedlings moist, or just schedule irrigation of potted plants or sprinklers. These types of systems can be used to maintain high humidity for various applications. This article covers all the components you might use when setting up an intermittent mist system.