Watering system

Use a plastic pan for over water. Get a Power controlled solenoid valve (open,close) for a drip line. Put a 5 gallon bucket above fabric pots to use gravity. Put the silinoid on a timer. Make sure the drip line tip you use is rated for X amount of gallon drip per hour. (do the math to what you need) (use a splitter on the end of the drip line to redistribute to as many pots as you need, just make sure all the lines are the same length so the water/pressure is distributed evenly. When power goes on, it open the valve and lets the nutes drip. Soon as the power is turned off silinoid stops and nites stop dripping. If I can ill post a picture of a grow I did with this method. TURNED OUT GREAT. use COCO Coir for the medium (less to no bugs, and you can feed it like its hydroponics)

To answer your question a few more details would help. What medium are they in? You could use gravity. Get a large reservoir (you can buy flexible tanks, flexitank maybe lol) Have it elevated with feeder pipes and drippers. You could use a pump sprayer for ease and individual feeds Dwc I would need to know what you actually want. Is it less work, automation.

Unless your doing clones I would just hand water. Each pheno will grow at different rates so they need they're own nutrient feed. One might be budding one not so the budding one will need more pk for example . Not a big fan of using reservoirs unless you are using clones where the plants grow very similar. Not to say auto feed systems don't work they're just not for me. Each plant deserves the correct feed at the right time I think.