yup, and big pots love being watered slowly and I mean slowly. 20L during flowering, 6L easy bro. don't matter about getting run off, just make sure you throw that away.
if you bung water just on her, it will either drain out of the side and to the bottom straight away or bore 'water holes' through to the bottom and just drain away, waste of feed. So to get the water to sink correctly and slowly
Water them right in the middle, near the stalk, but don't water more than half the diameter of the pot. halfway from stalk to edge, wait for it to sink in, then repeat, keep doing this over and over until water begins to seep out of the bottom holes, or if airpot the bottom sides.
Or if you have a single probe moisture meter, stick that in the side / at the bottom and keep watering slowly until it reads 'wet'
takes time tho bro, best get a nice one rolled for the duration.