Watering on different stages

it's the same for all stages and plant types with a few caveats for the more vulnerable seedling / clone you give enough water to saturate entire pot. a little runoff is fine. how often you add fertilizer depends on how often you want to fertilize. if soilless, should be 10% runoff and fertilize every single irrigation. wait for top layer to dry and repeat. (soil - 1" deep or so.. in coco coir, top lyaer starts to change color, can preempt that later on in bloom) don't try to pick a volume out.. that's hubris and or bad habit. this assumes the plant is appropriately sized for the pot. if a very small plant is in a large pot, it stays wet too long. you still want to make sure a column of water gets all the way down to the bottom of the pot, or you will be promoting superficial root growth and potentially creating ebb/flow zone of dried mierals which can lead to all sorts of nutrient or pH imbalances. a good wet-dry cycle promotes deeper/better roots. you can gas it in flower if you want, but develop those roots in vege. roots turn toward moisture. you want the bottom and central areas to remain moist the longest -- this doesn't happen if you sprits the top layer or try to choose some volume of water that is not actually sufficient to do it properly. you learn how much water you need relative to pot size in hindsight. you do not choose it. seedlings you might want to irrigate slightly sooner than a more mature plant -- just that first irrigation after sprouting. the risk of the taproot drying out outweighs other concerns those first 1-3 days above ground. clones you avoid any drying up top too, as that will potentially kill a clone. what constitutes the substrate and how much of it there is determines how much water you need to get the job done. if you wait until same level of dryness each time, it will require a similar volume of water each time. you learn that in hindsight. i'm not a fan of foliar sprays without a very specific reason. More often it just makes people feel like they are doing "something." if RH is good, you don't need to spritz seedlings. in an arid environment it might be good to spritz seedlings, but a humidity dome can save you the trouble. the tap root will provide plenty of moisture and if VPD is proper, it won't drink much anyway. should take several days even in a small seedling starter tray. Good vpd is what you want, but not long-standing water on leaves. Just inviting microbial growth, imo.