Better Buds With Mr. Bill: Standard Cannabis Element Levels For Comparison
Ask our expert Cannabis grower for help with your worst grow room problems
Ask our expert Cannabis grower for help with your worst grow room problems
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A laboratory analysis can reveal the positives and negatives of your nutrient regimen. |
Mr. Bill is ready to assist you by drawing upon over twenty-eight years of active grow shop experience - including answering growers' questions about the hydroponic industry. Before Mr. Bill opened his first store he worked in the agricultural industry for five years, growing tobacco.
Dear Mr. Bill,
I recently conducted a tissue and media analysis of my crop (attached) to identify my nutrient program's effectiveness. Unlike most other species, there is very limited technical data available to evaluate these results against. The data is showing high levels of P, K, Mg and Ca but what are the appropriate levels? Would you be able to point me in the direction of research data that establishes optimal base line data for pH, CEC, macro- and micro-nutrient PPM levels and causal relationships associated with variable environmental conditions?
Sincerely,
Brian
Hi Brian,
Below is a chart of the most common macro- and micro-nutrients that your plant needs to survive, and their typical concentration in dry Cannabis tissue. You can use this as a guide to ensure that your plants are receiving the required quantities and maintaining proper PPM levels; compare your charted results with those listed below to find out if you're on the right track.
STANDARD CANNABIS LEVELS FOR COMPARISON
|
Element |
Symbol |
Available Form |
Atomic Weight |
PPM |
Concentration in Dry Tissue (%) |
|
Hydrogen |
H |
H2O |
1.01 |
60,000 |
6 |
|
Carbon |
C |
CO2 |
12.01 |
450,000 |
45 |
|
Oxygen |
O |
O2, H20 |
16 |
450,000 |
45 |
|
Nitrogen |
N |
NO3-, NH4+ |
14.01 |
15,000 |
1.5 |
|
Potassium |
K |
K+ |
39.1 |
10,000 |
1 |
|
Calcium |
Ca |
Ca++ |
40.08 |
5,000 |
0.5 |
|
Magnesium |
Mg |
Mg++ |
24.32 |
2,000 |
0.2 |
|
Phosphorous |
P |
H2PO4-, HPO4- |
30.98 |
2,000 |
0.2 |
|
Sulfur |
S |
SO4- |
32.07 |
1,000 |
0.1 |
|
Chlorine |
Cl |
Cl- |
35.46 |
100 |
0.01 |
|
Boron |
B |
BO3≡, B4O7≡ |
10.82 |
20 |
0.002 |
|
Iron |
Fe |
Fe+++, Fe++ |
55.85 |
100 |
0.01 |
|
Manganese |
Mn |
Mn++ |
54.94 |
50 |
0.005 |
|
Zinc |
Zn |
Zn++ |
65.38 |
20 |
0.002 |
|
Copper |
Cu |
Cu++, Cu+ |
63.54 |
6 |
0.0006 |
|
Molybdenum |
Mo |
MoO4= |
95.96 |
0.1 |
0.00001 |
Hope this information helps you!
Cheers,
Bill
S
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