N is easy to suppliment and as long as you don't over fertilize the plant will only take up what it needs.

Why are you giving them 1/4 strength? Unless you are feeding every time you water then you'll end up underfeeding.
Purple Daddy Reviewed by Purple Daddy on . 0-10-10 Ferts While Flowering? I've got some Liquinox Bloom 0-10-10 that I bought to treat some plants that were showing plenty of N, but lacking in P and K. I applied it (quarter-strength) to my soil grow as needed during veg and gave one more drink when I moved my girls into flowering. Is this enough to see me through until harvest or do I need a different balance? Because of the soil I'm using there aren't any N deficiencies and somehow I've managed to maintain a soil pH of 6.5-6.8 and I don't want to mess that up. Rating: 5