|Week||ppm N||Target EC||Ratio N-P-K-Ca-Mg||N-P-K-Ca-Mg in ppm||NO3-/NH4+||K:Ca:Mg||Jack’s Part A(5-12-26-0-6) : Jack’s Part B(15-0-0-18-0) : Finish(7-15-30-0-2):Epsom Salt ( 9.8 % Mg )|
|Propagation (day 7 )||75 - 100||0.5 - 1.0||1-1-1.||75-75-75|
|Early Vegetative||First 2 weeks after transplant||100 - 125||1 - 1.5||1 - 0.6 - 1.3 - 0.9 - 0.45||100-60-130-90-45||1/0||1:0.7:0.35||1:1:0:1/3|
|Late Vegetative||Vegetative 3-10||150 - 200||1.5 - 2.0||1 - 0.6 - 1.3 - 0.9 - 0.45||200-120-260-180-90||1/0||1:0.7:0.35||1:1:0:1/3|
|Pre Flowering||Flowering 1-4||200 - 225||2.0 - 2.5||1 - 0.8 - 1.7 - 0.75 - 0.375||225-180-380-170-85||1/0.08||1:0.45:0.25||1:1:0.5:1/5|
|Peak Flowering||Flowering 5-8||100 - 150||1.5 - 2.0||1 - 1 - 2 - 0.66 - 0.33||125-125-250-83-41.5||1/0.15||1:0.33:0.16||1:1:1:1/10|
Do you have a link to the program or spreadsheet you used to calculate and display your NPK/CA/Mg ratios? If I have time in the next few weeks to dig through my notes I’ll compare what you shared against the information I have. Thanks for sharing!
I dont , i was doing manually on piece of paper trying different combinations .
I used as a base the studies of Brian Whipker the professor from North Carolina State University he is most active in the cannabis world and Lynn Griffith from Harrells .
Based on the last studies about cannabis i had few starting points :
- High Nitrogen until late in transition
- Minimize the K not more then 1:2 in flowering N/K ratio , and keeping reasonable levels to not block Ca and Mg
- Minimize the P as much as possible especially at the start of the flowering period , P is number one factor in stretching there is a ton of studies about that in contrary of the commercial hobby fertilizers i will try to cut it even more on 20 ppm P - 45 ppm P2O5 , when i will have time to do some updates
- Keeping the K:Ca:Mg ratio close to 4:2:1 because of their ability to block each other , maybe just the Mg to pump a little its easy with the Epsom Salt 4:2:1.5 , Cannabis loves Mg
- As much as possible N from Nitrate
- Keeping the N in amounts of 100-250ppm ; P 20-25 ppm ; K2O 250-400 ppm ; Calcium 150-250 ; Magnesium 25-50 ppm ; Sulfur 50-200 ppm ; and micronutrients
- Last 4 weeks of flowering on the lower side of EC