Hi
@Omahoney_Canna_Thusiast no strain is sensitive to nutes, some tolerate more excesses than others. I think you should slightly increase the nutes, you will increase 0.3ml / 0.5ml and see how the plant reacts to the increase, if the answer is positive, you increase it a little more. I've been looking at your photos, the plant seems to lack calcium. apply calmag, magnesium and calcium are never too much at this stage. good luck mate 👍