What kind of deficiency ?

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otloble1

Member
Hello all
I have Jock horror flowering for 40 days and cheese flowering for 20 days yellow dots appeared 2 days ago on some leaves and some of them begin to die.

Planted in: Ebb and Flow system
Type of fertilizer :20-20-20 + te without calcium or magnesium
Light type: air cooled hps 800w

Type of water: reverse osmosis 20 ppm then add tap water to reach 100 ppm and then 50ppm magnesium sulfate and then 50ppm calcium liquid contains 10% nitrogen and 21% calcium and 600 ppm 20-20-20 + TE = 800 ppm mix


There is another type of fertilizer for flowering stage
10-35-10
Nitrogen source
7.8% Ammoniacal nitrogen
2.2% nitritenitrogen
0% urea
And contains all the trace elements without calcium or magnesium

Or 15-30-15
Nitrogen source
8.6%Ammoniacal nitrogen
4.4% nitrite nitrogen
2% urea
And contains 200 ppm magnesium and all trace elements without calcium

My questions are
1 - What kind of deficiency that i have?
2 - What is the correct ppm and the correct way to add magnesium sulfate and calcium liquid contains 10% nitrogen and 21% calcium?
3- Are the other two fertilizer better from the 20-20-20 at the flowering stage ?

Jock horror images 1-2-3 from left Chesse images 4-5

Thanks in advance
 

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LadyZandra

LadyZandra

Active Member
20-20-20??? In HYDRO? with Cannabis- that is a hUGE no no! They are locked-up from too much Nitrogen!
Dump the rez and run plain pH adjusted water thru overnight-- then add nutrients that are COMPLETE balanced nutes with all the micros and the right N-P-K for flowering... the "N" should be lowest-- the "P" the Highest and the "K" somewhere in-between.... and they need calcium, magnesium, Boron, Iron, etc.... regular nutes will give you all you need. Go grab an inexpensive bottle of General Hydroponics, or Ionics....Bloom formula... and use the LOWEST amount listed to start out.

I have a list of different nutrients and how to use them on a schedule- PM me if you need one of them. ;)
 
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otloble1

Member
LadyZandra said:
20-20-20??? In HYDRO? with Cannabis- that is a hUGE no no! They are locked-up from too much Nitrogen!
Dump the rez and run plain pH adjusted water thru overnight-- then add nutrients that are COMPLETE balanced nutes with all the micros and the right N-P-K for flowering... the "N" should be lowest-- the "P" the Highest and the "K" somewhere in-between.... and they need calcium, magnesium, Boron, Iron, etc.... regular nutes will give you all you need. Go grab an inexpensive bottle of General Hydroponics, or Ionics....Bloom formula... and use the LOWEST amount listed to start out.

I have a list of different nutrients and how to use them on a schedule- PM me if you need one of them. ;)
Click to expand...
I do not think 20-20-20 is the problem if it too much why the plant was in excellent health for the veg period of 6 weeks and 5 weeks later in flowering without any problems.

[FONT=arial, sans-serif]For fertilizer I live outside the U.S. and there is no specialist shop for hydroponic [/FONT]

[FONT=arial, sans-serif]This is the only three that I can get here[/FONT] what do you think is the best ?

20-20-20
Nitrogen source
8.4% Ammoniacal nitrogen
5.7% nitritenitrogen
5.9% urea
And contains all the trace elements with 200 ppm magnesium without calcium

10-35-10
Nitrogen source
7.8% Ammoniacal nitrogen
2.2% nitritenitrogen
0% urea
And contains all the trace elements without calcium or magnesium

Or 15-30-15
Nitrogen source
8.6% Ammoniacal nitrogen
4.4% nitrite nitrogen
2% urea
And contains 200 ppm magnesium and all trace elements without calcium

This is the only three that I can get it here. thanks
 
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otloble1

Member
I buy 20-50-45 how much ppm the reservoir must be do i go to 1000 ppm or 500 ppm for the 6 week of Flowering?

growing system: Ebb and flow
Type of water: 100 ppm ro mix with tap water
 
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