Here is my issue Joe. With the soil I created, I tested it on first run under good lights, not great and certainly not the most powerful. I got a baseline for what my soil would support in different pot sizes.More than anything Joe, what Van is saying is that you must be ahead of the growth of your plant with your pot size. If you increase your Par levels on your plant, you're increasing her needs. As she needs more, she needs Pot space. I can go a maximum of 5 gallons in my space so I will have to veg appropriately. I don't plan on anything really longer than a 30-day veg, after they have spent 20 to 30 days in the cloning tent as well. Each time they will be up potted from a solo, to a 1-gallon, to a 5-gallon in my situation......of course this is for the Stank soil.
Now fast forward to this grow. I upgraded my lights to top of the line Fluence Spydrx Plus. I knew that the more powerful light was going to test the ability of my soil to support the growth the plant would see under the light. The issue I am running into is that I am running into a deficiency in smaller pots after 3 weeks. By smaller pots I mean 1 gallon pots. I was able to get about 4 weeks in 1 gallon pots under the old lights and then I would up pot to their final containers. I am not able to keep them in 1 gallon pots for 4 weeks with the new lights so that tells me that my intuition about the light testing the ability of the soil is correct.
So I need to figure out what deficiency is popping up and rectify it on future batches of soil. In the mean time, the solution in my soil is run in a bigger pot than you would under average lights. So now I am running in 2 gallon pots and seeing if I can get 4 weeks out of it before needing to up pot to its final container (5 gallons for males that i am harvesting pollen for, 7 gallons for strains with a flower time under 10 weeks and 10 gallon pots for strains with 10+ flower times). Keep in mind, I don't use nutes at all for feeding so my soil has to be able to support growth from start to finish. I do use Aerated Compost Teas for a little shot of extra stuff for the microbes in the soil and a tasty little snack for the plant, but thats it unless I see any sort of deficiency.