root bound during flowering question

[stinkyattic]

thank you, i didn't know u need to put another dose of high N. two weeks into flowering

I would warn against trying to do it with a chemical fert. Something slow-release in the soil is better. Bushy Old Grower, who is a LEGEND, recommends a soil mix that includes blood meal even in the flower stage as a slow-release fert.
I just bought his book and really like his simple, unfussy approach to organic gardening.