My first grow Blueberry Seedsman DWC

Hi mate, Looks like calcium deficiency due to excessive nitrogen. Exactly what's going on with my plants. I've been trying to correct my nitrogen toxicity for a few feeds with little success. This has started with my plants today, a little less obvious than yours though. You need to cut the N down a little and feed some cal mag. Careful with the calmag as most seem to contain nitrogen. I'm going to be cutting all sources of N on my plants until they start to turn a little lighter in colour. (Not cutting the calmag obviously) Hope this helps 🙂