Question for professional Growers about feeding

[flowerdave]

I grew flowers in a large greenhouse operation and we fed a lot of crops everyday about 200 ppm N never above 300 ppm. On the EC meter it would read about 2.0 to 3.0 depending on the water source. My question is on here people talk about 600ppm and more that they a feeding. That would put the Ex reading at over 5.0 and to me that is crazy high. Is that correct for cannabis to be so much more than other plants?

 

[Buzzzz]

I grew flowers in a large greenhouse operation and we fed a lot of crops everyday about 200 ppm N never above 300 ppm. On the EC meter it would read about 2.0 to 3.0 depending on the water source. My question is on here people talk about 600ppm and more that they a feeding. That would put the Ex reading at over 5.0 and to me that is crazy high. Is that correct for cannabis to be so much more than other plants?

The high readings are for the entire solution not just N

 

[flowerdave]

The high readings are for the entire solution not just N

Thank you. That makes sense

 

[Pushrod Monkey]

I grew flowers in a large greenhouse operation and we fed a lot of crops everyday about 200 ppm N never above 300 ppm. On the EC meter it would read about 2.0 to 3.0 depending on the water source. My question is on here people talk about 600ppm and more that they a feeding. That would put the Ex reading at over 5.0 and to me that is crazy high. Is that correct for cannabis to be so much more than other plants?

Did you not supplement the other nutrients such as potassium and phosphorus in a flower operation? Were you using dry nutrients like Jack’s or Envy?

 

[Buzzzz]

Thank you. That makes sense

The elements dont exist on their own or usuable alone so they are mixed with others to form a solid you can work with so you derive say the nitrogen from potassium nitrate but now your mixture also goes up in K so ppm goes up. Same with K and P ,anytime you add,in some cases, you also increase the others. The math and chemistry people figure out the formulas for recipies taking it all into consideration.

 

[growsince79]

I grew flowers in a large greenhouse operation and we fed a lot of crops everyday about 200 ppm N never above 300 ppm. On the EC meter it would read about 2.0 to 3.0 depending on the water source. My question is on here people talk about 600ppm and more that they a feeding. That would put the Ex reading at over 5.0 and to me that is crazy high. Is that correct for cannabis to be so much more than other plants?

PPM meters have different scales. On my meter, 500ppm is 1.0ec. 5.0ec would be 2500ppm. Some meters read 700ppm @1.0ec. so 3500ppm @5.0.