I've basically gathered that once the N deficiency shows, it's already too late to fix it. I'll definitely try a more regimented top dress schedule next time around.
SSH is at day 7 now. Took four days to pop and emerged on the 7th. Hoping the 7 gal pot does me better. I intend on top dressing week three and then every two weeks after. Here's to a better run.
Cheers for the help guys.