Would a combination of giving my plant too much ni...

Hey Canna Grower! Initially I would say she has a nitrogen toxicity due to the clawing of the leaves being so 'sharp'. I see that in the final weeks of Veg you were giving 3tsp of Growbig (6-4-4). Then during flowering you reduced this by 1 tsp, but added 2 tsp of Tiger Bloom (2-8-4). Overall there was an Increase in the Nitrogen while entering flower and the vast majority of strains like a decrease in Nitrogen while entering flowering. I believe this is the main source of your problems as a Nitrogen Toxicity can impact the final weight significantly if not taken care of. Its hard to diagnose the smell portion without being more hands on to determine the source of the smell. If the source is from the soil/roots then watering is the primary culprit. If the source is coming from the plant in general Its possible she is transpiring a lot due to a low Vapor Pressure Deficit, but I don't think this is the case unless the RH and Temps mentioned in your diary are typos. You are correct to let her dry out for a few days before starting a flush. Ideally you want the flush to start immediately, but with the added issue of a Wet grass smell I would be careful of doing that.