There are potentially many variables here, such as medium, and plants require differing nutrients at different times in their lifecycle. E.g. the reason PK boosters exist. And, yes, formulas tend to be plant specific. A formula for tomatoes will probably work for green beans but it would be less than ideal. There are all-in-one formulations that will give you a general guideline of nutrient ratios that are sufficient for each of the growth stages. The ideal situation is spoon feeding specific nutrients as the result of tissue analysis, but that is more or less limited to commercial operation.
Take a look at the references noted earlier, in particular download the hydrobuddy application if you want to play with ratios. There is a formula for canna in there for both veg and flower.
The label for the nutrient solution that you have is expressed is in % and I’m too lazy to back calculate the PPMs. But, it’s possible to calculate the contribution in PPM. You could try to duplicate this in the hydrobuddy since you know what ingredient chemicals that they are using.
As a point of comparison, here are some formulations expressed in PPM from a post looking into Copper concentrations: Can copper be safely used in hydroponics to keep roots out of drains?
Ultrasol
Total Nitrogen 130
Ammoniacal N 7
Nitrate N 123
Phosphorus 66
Potassium (K) 240
Calcium 123
Magnesium 52
Sulfur 90
Boron 0.5
Copper 0.7
Iron 3
Molybdenum 0.1
Manganese 1
Zinc 0.4
Likewise, Megacrop indicates the following at an EC of 1.67:
Megacrop
Total Nitrogen (N) 158.5040
Nitrate Nitrogen (NO3-) 152.1563
Ammonical Nitrogen (NH4+) 6.3403
Phosphorous (P) 38.0431
Potassium (K) 190.7790
Magnesium (Mg) 30.1152
Calcium (Ca) 103.0256
Sulfur (S) 17.4353
Iron (Fe) 1.2682
Zinc (Zn) 1.7433
Boron (B) 1.2682
Manganese (Mn) 1.2682
Copper (Cu) 0.7925
Molybdenum (Mo) 0.1584
Silicon (Si) 1.5849
Total PPM 545.999
Jack’s Hydro-FeED(16-4-17)
Nitrogen (N) 150
Phosphorus (P) 16
Potassium (K) 132
Calcium (Ca) 38
Magnesium (Mg) 14
Iron (Fe) 2.1
Manganese (Mn) 0.47
Zinc (Zn) 0.49
Boron (B) 0.21
Copper (Cu) 0.131
Molydenum (Mo) 0.075
Jack’s Hydroponic (5-12-26) + Calcium nitrate
Nitrogen (N) 150
Phosphorus (P) 39
Potassium (K) 162
Calcium (Ca) 139
Magnesium (Mg) 47
Iron (Fe) 2.3
Manganese (Mn) 0.38
Zinc (Zn) 0.11
Boron (B) 0.38
Copper (Cu) 0.113
Molydenum (Mo) 0.075
ModifiedSonneveld’s solution
Nitrogen (N) 150
Phosphorus (P) 31
Potassium (K) 210
Calcium (Ca) 90
Magnesium (Mg) 24
Iron (Fe) 1.0
Manganese (Mn) 0.25
Zinc (Zn) 0.13
Boron (B) 0.16
Copper (Cu) 0.023
Molydenum (Mo) 0.024
Peter’s Professional Hydroponic Special (5-11-26)
Nitrogen (All Nitrate) N 50
Phosphorus P 48
Potassium K 216
Magnesium Mg 60
Sulfur S 80
Iron Fe 3
Manganese Mn 0.50
Zinc Zn 0.15
Copper Cu 0.15
Boron B 0.50
Molybdenum Mo 0.10
Then, compare this to some of the other formulations that provide sufficient information. This may give you an idea if there is some sort of deficiency in the formula you are using or at least it’ll give you an idea of differences from other formulas that folk have general success with.
Consider looking at the Megacrop calculator PPM tab that will give you an idea of the PPMs for each individual nutrient for their formulation.
Also, there are some posts on other forums that go into detail of what others have tried and succeeded with DIY formulations.
https://www.rollitup.org/t/easy-diy-laymens-coco-coir-ingredients-from-fatman.869038/
I’m certain at some point a general thread will be opened up here to discuss this in greater detail.
Is there something deficient in the Cutting Edge formula? IDK, could be. Need to give us the PPMs of the macro and micro nutrients of the final nutrient contribution in order to compare.