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Plants require 17 essential elements for growth:
Carbon (C)
Hydrogen (H)
Oxygen (O)
Nitrogen (N)
Phosphorus (P)
Potassium (K)
Magnesium (Mg)
Calcium (Ca)
Sulfur (S)
Boron (B)
Chlorine (Cl)
Copper (Cu)
Iron (Fe)
Manganese (Mn)
Molybdenum (Mo)
Nickel (Ni)
Zinc (Zn)
? Silicon (Si)
Carbon (C)
Hydrogen (H)
Oxygen (O)
Nitrogen (N)
Phosphorus (P)
Potassium (K)
Magnesium (Mg)
Calcium (Ca)
Sulfur (S)
Boron (B)
Chlorine (Cl)
Copper (Cu)
Iron (Fe)
Manganese (Mn)
Molybdenum (Mo)
Nickel (Ni)
Zinc (Zn)
? Silicon (Si)
Let's break them down:
Hydrogen & Oxygen come from water
Carbon & Oxygen come from CO2 in the air
Nitrogen, Phosphorus & Potassium (N-P-K) are called macronutrients
We see numbers on all nutrient containers with 3 numbers such as 20-20-20
This means 20% N, 20% P, 20 % K
Hydrogen & Oxygen come from water
Carbon & Oxygen come from CO2 in the air
Nitrogen, Phosphorus & Potassium (N-P-K) are called macronutrients
We see numbers on all nutrient containers with 3 numbers such as 20-20-20
This means 20% N, 20% P, 20 % K
Then we have the secondary nutrients, Calcium (Ca), Magnesium(Mg), Sulfur (S)
Calcium can come from various sources- Calcium Nitrate Ca(NO3)2 , for eg, is very cheap
Epsom salts (MgSO4) are inexpensive, readily available & provide an ample source of both Magnesium & Sulfur
Calcium can come from various sources- Calcium Nitrate Ca(NO3)2 , for eg, is very cheap
Epsom salts (MgSO4) are inexpensive, readily available & provide an ample source of both Magnesium & Sulfur
The micronutrients Boron (B), Chlorine (Cl), Copper (Cu), Iron (Fe), Manganese (Mn), Molybdenum (Mo), & Zinc (Zn) are needed in relatively low amounts & there's usually enough when using a commercial fertilizer
You can also buy micronutrient supplements: https://www.amazon.com/Micronutrient-Nutrients-Simple-Lawn-Fertilizer/dp/B01N19BYG1
You can also buy micronutrient supplements: https://www.amazon.com/Micronutrient-Nutrients-Simple-Lawn-Fertilizer/dp/B01N19BYG1
I believe in Canada 
fertilizers must display a "guaranteed minimum analysis" on the package
Usually on the back, this is the one for the micronutrient product listed above- all fertilizer products should have it, & you should pay attention to them
Also note "Derived from: "
fertilizers must display a "guaranteed minimum analysis" on the packageUsually on the back, this is the one for the micronutrient product listed above- all fertilizer products should have it, & you should pay attention to them
Also note "Derived from: "
