Common soil, nothing special, just ph around 6
good question, his soils capacity for water holding is much greater than what im use to in the same sized containers. which is why you need to figure out how to water your plants grown in your specific environment and in your specific substrate, not to go by a range of days between waterings but figuring out by weight or moisture test when to do so. i have never watered to runoff on purpose personally havnt found a need unless you are flushing, drowning your roots for days isnt the way to go if you want explosive growth, but what do i know its just my 2cs
I usually water my plant when the soil is almost fully dried! For that soil and all the conditions after 3-4 days and never had underwatering issues!
I checked though that with 3Lt of water i had a little bit of runoff just to take some measurements like ph and EC! So i usually water with 2.5Lt so no runoff at all
Last time i watered was 2 days ago, and due to signs of N deficiency, i fed today (after 2 days of pure watering), with 2Lt of water+nutes, and still no runoff, thats means that the plant drunk all the water (2,5Lt) in 2 days! I think i will keep watering after 2 days and i will use feed-feed-water-feed-feed-water schedule! Btw i dont have so much time to check things out because i already am at 70days, maybe i have 2-3 weeks until the end of the trip!