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