Larger containers help, OT. Then you don't have to water as often. If they're going dry that fast, the containers are just too small. Also, if that's a dry, trimmed yield (weight), you're doing very well in such small containers. I've been growing for a long time, and the best yield I have got from a 7 gallon pot is around 650g dry and trimmed.
Now, this depends somewhat on your particular soil mix, but here's my basic math; my indoor plants are all in 7 gallon fabric pots. It takes about one gallon to fully saturate them when nearly dry. I only water once they're almost dry. This gets trickier when top dressing amendments on outdoor plants, as then you need the surface to stay at least somewhat moist (for proper nutrient cycling, which is driven by soil microbes (when growing organically anyway)).
I would at least double your container size, if I were you. I run them big, 65 gallon per plant this year. Even with 65 gallon pots, California growers would scoff, and ask "why so small"?
Now, this depends somewhat on your particular soil mix, but here's my basic math; my indoor plants are all in 7 gallon fabric pots. It takes about one gallon to fully saturate them when nearly dry. I only water once they're almost dry. This gets trickier when top dressing amendments on outdoor plants, as then you need the surface to stay at least somewhat moist (for proper nutrient cycling, which is driven by soil microbes (when growing organically anyway)).
I would at least double your container size, if I were you. I run them big, 65 gallon per plant this year. Even with 65 gallon pots, California growers would scoff, and ask "why so small"?