How much water for a 5 gal pot per feeding?

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I dump 2 liters of water in a 3 gallon fabric pot and that seems to wet everything nicely. Plants are happy and in need of water every 3 days. For 5 gallons, try 4 liters of water. If you want some runoff then maybe 5 or 6 liters. Depends on how you apply the water too. If you just douche it in fast you'll get some that leaks through the fabric and out the sides. Pour it in more slowly and it will penetrate the soil better and more evenly. If you are growing Photo Periods i would not plant a germinated seed into a 5 gallon pot right off the bat. You'll likely over water it and kill it. If it's auto's you intend on growing, you won't need a 5 gallon pot. 3 gallon is a much better size for auto's because they don't grow a huge root mass. Your roots will likely never touch the sides of your 5 gal pot or the bottom.

Honestly it's different for everyone depending on their Temps, how much air flow they have, have much fans they have pointing at the containers.. the amount of perlite or vermiculite they used with the coco.. it's all different. Even each brand of coco is different. I make coco 60/40 perlite. Although next run will probably be only coco. Perlite can't hold nutes so 40% of the container size is nuteless and can't give anything to the nutes. I just read this today tbh. Anyways 60/40 is what I run. I mix it then wet it until I can squeeze it without it dripping constantly between fingers. When I squeeze it I want it to have a few drops and that's it. Then I plant the seed in final container half inch deep. Everyday I mist the coco 3 to 4 inches around the seed until it sprouts. Then I will continue misting the ENTIRE pot for the first 3 or 4 days of the seeds life after it pops up. Constantly misting the top to keep it moist but not wet. Since I soaked it in the beginning the rest is technically wet. Slowly I will increase feedings. After week 1 I will start watering 50ml, then work up to 300ml.. You only want to water around 4 or so inches from the seedlings.. the rest of the pot you want to mist the top just to keep it from drying. After 2 weeks the plant should be established and will need more. Depending on how you want to feed you can do one watering per day at a smaller amount or once every other or ever 3 days with a larger amount. I've noticed letting it dryback atleast 50% helps in veg. The coco gets to dry some, so the roots push to find water. This makes the rootball bigger. Once veg is over then you pack water and nutes and the rootball will be big enough to handle it. If you keep it over Watered the roots will never have to push to find any, thus they will stay small and only fill top one third of container. Trust me this happened last grow. This grow after week 2 I started feeding 2pints or 4 cups. This is enough for my 3 gallon containers for 2 or 3 days. Then I pick it up and feel how heavy. When the container is half the weight I then rewater but each week I bump up 1 more pint. Week 3 I'm doing 3 to 3.5 pints or until 10-20% runoff so I can check ppms and ph. By week 4 I'm doing half a gallon or 4 pints every other day. When week 5 and 6 hits, their in bloom and are taking 1 gallon daily or damn near it. Always with 10-20 runoff to push out old nutes to prevent lockouts. Although this is necessary first 2-3 weeks of life. Around week 4 is when I star watering until runoff. Alright sorry if I've rambled. Trying to break it down as I do it. Goodluck growmie. Message me if you need anything.

You can use the finger test and actually pick the potter up to judge its weight. 1 gallon of water is 8 lbs. So you will notice a considerable difference between wet and dry substrate.

depends on how it is constituted. the trick to learning a specific volume needed is irrigating at same loss of weight. in hindsight, you will learn the volume needed and it will be consistent. Wait for top 1" to dry, feel weight... don't have to stick your finger in soil anymore, but you can. the time between will change as plants grow. use more perlite, next time. closer to 50/50 in soil is well-worth any increased frequency of irrigation. - perlite or anything similar does the job well. not the end of the world. plants will grow fine. maybe a bit more susceptible to overwatering etc.. but with good irrigation habit explained above, easy to avoid. More perlite = less water capacity = more frequent irrigation. don't worry about what it holds. give it what it needs, then learn how much that is in hindsight. if constituted the same way, will be the same next time. if you add more perlite, expect it to be less water than these pots. will be lighter to start and when top 1" dries.