ttystikk
Well-Known Member
Temperature, RH, CO2 supplementation and light intensity all play into EC requirements. I tend to run a lot of light, a bit warm, humid and lots of CO2.
I began to see deficiencies at 2.0 - 2.2.
Jacks (JR Peters) nutrients
- Thread starter Growerguy420
- Start date
I began to see deficiencies at 2.0 - 2.2.
im4satori
Well-Known Member
yes
I understand
high humidity require more than low humidity environments but it certainly wouldn't double it
I have read about co2 allowing stronger EC and in my experience it wasn't at all true
my plants drank more water while using co2 at 1200 to 1500 ppm
to me this doesn't suggest theyd need a higher EC... theyre getting more nutrient just because theyre consuming more fluid more frequently
I think one of the biggest factors is watering frequency
im in Rockwool so I can drip more often
your watering maybe 1 time per day and im watering 3 to 4x
that might account for a large difference....
I understand
high humidity require more than low humidity environments but it certainly wouldn't double it
I have read about co2 allowing stronger EC and in my experience it wasn't at all true
my plants drank more water while using co2 at 1200 to 1500 ppm
to me this doesn't suggest theyd need a higher EC... theyre getting more nutrient just because theyre consuming more fluid more frequently
I think one of the biggest factors is watering frequency
im in Rockwool so I can drip more often
your watering maybe 1 time per day and im watering 3 to 4x
that might account for a large difference....
ttystikk
Well-Known Member
I'm pushing a lot more light and so my transpiration rates are high.
im4satori
Well-Known Member
how many watts per sq ft?
ttystikk
Well-Known Member
37.5W/sq ft of high powered COB LED with lenses. They're getting a lot of light, lol
rockwool also has a zero cec... I top drip in wool and run into over fert issues with an EC above 1.8 or so.
So I was reading thru here again and thinking of ordering some Aquagold or maybe I should just get Potassium Sulfate to supplement Jacks Citrus.
Aquagold is $61 for 25lb bag shipped:
https://www.martinsproducesupplies.com/fertilizer/jacks-7-15-30
Or $6 for 1lb of Potassium Sulfate.
I still have another 1.5lb tub plus what is left in my first tub of citrus so I dont need to order more just thought I should up the sulfur as the "secret nute for potency is sulfur" per @RM3
https://www.rollitup.org/t/jacks-jr-peters-nutrients.850683/page-2#post-11179751
I am not great at reading what plants need as I have only done this for a couple years now. I obviously rely heavily on research and input from here.
I posted before that I have not done too bad so far. I got over 1g/watt on 2nd grow and things have been decent looking:
https://www.rollitup.org/t/jacks-jr-peters-nutrients.850683/page-17#post-13283133
I just want to make it better and things are going well now that I switched to tap water (well) / RO mix (due to hard water 280ppm) with 3g/gallon Jacks citrus. I seem to get higher than expected PPM readings off my BL tester after mixing tap and RO water so I may need to increase the amount of Tap water to account for this inaccuracy.
Switched to 12/12 on 2/15 so not much to see but look healthy I think:
(Click thumbnail for full size)
Couple more pics:
https://www.rollitup.org/t/cob-grow-amnisia-cheese-sugar-something.931923/#post-13375790
I have been PHing to 5.8 which may be too low, at least I should start heading toward 6.0? 6.2? 6.5? for flower? or just vary between 5.8-6.0 or?
These are in 5g hempy buckets with coco (actually half are canna Terra, half canna coco). I have a hard time getting enough water in them for them to drain but I try.
Thanks for help.
Aquagold is $61 for 25lb bag shipped:
https://www.martinsproducesupplies.com/fertilizer/jacks-7-15-30
Or $6 for 1lb of Potassium Sulfate.
I still have another 1.5lb tub plus what is left in my first tub of citrus so I dont need to order more just thought I should up the sulfur as the "secret nute for potency is sulfur" per @RM3
https://www.rollitup.org/t/jacks-jr-peters-nutrients.850683/page-2#post-11179751
I am not great at reading what plants need as I have only done this for a couple years now. I obviously rely heavily on research and input from here.
I posted before that I have not done too bad so far. I got over 1g/watt on 2nd grow and things have been decent looking:
https://www.rollitup.org/t/jacks-jr-peters-nutrients.850683/page-17#post-13283133
I just want to make it better and things are going well now that I switched to tap water (well) / RO mix (due to hard water 280ppm) with 3g/gallon Jacks citrus. I seem to get higher than expected PPM readings off my BL tester after mixing tap and RO water so I may need to increase the amount of Tap water to account for this inaccuracy.
Switched to 12/12 on 2/15 so not much to see but look healthy I think:
(Click thumbnail for full size)
Couple more pics:
https://www.rollitup.org/t/cob-grow-amnisia-cheese-sugar-something.931923/#post-13375790
I have been PHing to 5.8 which may be too low, at least I should start heading toward 6.0? 6.2? 6.5? for flower? or just vary between 5.8-6.0 or?
These are in 5g hempy buckets with coco (actually half are canna Terra, half canna coco). I have a hard time getting enough water in them for them to drain but I try.
Thanks for help.
Last edited:
Setup two 27 gallon bins to make water that I have tap and RO lines running to and then a hose off the bottom.
Added 96 grams of jacks citrus to ~33 gallons. PH 5.9 and 400 PPM (EC 0.8 this time.
Figure at this rate I will run out soon so placed order for another 3lb jacks cirtrus for $35 from JR Peters.
I am going to order 1lb potassium sulfate from another place and add dash here and there.
Added 96 grams of jacks citrus to ~33 gallons. PH 5.9 and 400 PPM (EC 0.8 this time.
Figure at this rate I will run out soon so placed order for another 3lb jacks cirtrus for $35 from JR Peters.
I am going to order 1lb potassium sulfate from another place and add dash here and there.
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Last edited:
I am at day 14 of flower and was hoping I could get some feedback on the mix I am feeding. Growing in coco/perlite, DTW. Plants look healthy, but I would like to optimize yield of course. How would you adjust this throughout flowering? Any boosts at some point? Should I lower N and increase P? When and by how much?
I use hydrobuddy for my calculations:
Grams/Gallon
0.5 - Magnesium Sulfate (Heptahydrate)
0.15 - Diammonium Phosphate
1 - CalMag (CUSTOM)
2 - Calcium Nitrate (CUSTOM)
0.65 - Potassium Silicate K2SiO3 (CUSTOM)
2.7 - Peters 5-11-26 Base <--basically Jack's with slightly lower P
0.3 - Ammonium Sulfate
PPMs work out to:
N (NO3-) - 126.538
N (NH4+) - 23.936
K - 240.973
P - 52.467
Mg - 71.67
Ca - 159.56
S - 93.478
Fe - 2.14
Zn - 0.107
B - 0.357
Cu - 0.107
Mo - 0.071
Na - 0
Si - 31.258
Cl - 0
Mn - 0.357
I also add fulvic acid at about 50ppm to this mix. Currently feeding at about 80% strength, EC 1.7.
I use hydrobuddy for my calculations:
Grams/Gallon
0.5 - Magnesium Sulfate (Heptahydrate)
0.15 - Diammonium Phosphate
1 - CalMag (CUSTOM)
2 - Calcium Nitrate (CUSTOM)
0.65 - Potassium Silicate K2SiO3 (CUSTOM)
2.7 - Peters 5-11-26 Base <--basically Jack's with slightly lower P
0.3 - Ammonium Sulfate
PPMs work out to:
N (NO3-) - 126.538
N (NH4+) - 23.936
K - 240.973
P - 52.467
Mg - 71.67
Ca - 159.56
S - 93.478
Fe - 2.14
Zn - 0.107
B - 0.357
Cu - 0.107
Mo - 0.071
Na - 0
Si - 31.258
Cl - 0
Mn - 0.357
I also add fulvic acid at about 50ppm to this mix. Currently feeding at about 80% strength, EC 1.7.
So I have been adding K2SO4 to my mix for a few weeks now. Not sure at what amount I should be adding but think I have done around .5g/gal in addition to Jacks. Things looking pretty good. Some burn as I think I calculated my gallons wrong in the past so was overdoing Jacks Citrus but nothing too bad. Switching around 2/15 so ~8 weeks since switch and clearly a few weeks left.
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ruwtz
Well-Known Member
I use Peters too. Watch out for Mg shortages - it contains half less than Jack's - especially early/mid bloom. I run anywhere from 0.2 - 0.3EC additional Mg sulfate all the way through.
That lower P is nothing to worry about. In fact i'm prone to overdoing the MKP at peak and alongside Mammoth P the foxtailing is crazy.
Well I am added 1g/gal potash this time. I may have done this the first time and then did closer to 0.5g/gal for a few waterings as it stunk the first time and did not after. So hoping I will get the sulfur stink with 1g/gal and hope I am not overdoing it.
This will be ontop of just under 3g/gal jacks citrus. PPM ~620 so I worry its too strong but ~100ppm of it is just the K2SO4 so think its fine.
mr. childs
Well-Known Member
how do you feel in total about the jacks citrus? i tried to do the ffj & fpe this time around, but was a little n deficient; i will be going back to jacks citrus & k sulfate & mk sulfates...
TimeToBurn
Well-Known Member
Our grow styles and demands sound similar. Only variable is I use Promix HP for soil so not sure how your soil compares. I PH between 5.8 and 6.2, usually around 6 on average. I started out using RO water and had some minor issues. Going full tap water improved any issues 100%. My tap is around 250ppm so your water is not too hard....don't strip those natural nutes out of your water. My ppm's of Jacks throughout growth range from 250ppm to 700ppm. Only supplement needed besides the Jacks is around 100ppm of Cal/Mag once or twice (usually once during veg and once during bloom). I'll also add some potassium sulfate 2 or 3 times throughout bloom also. Your plants look really good so just watch the shade of green in your leaves and zero in the ppm's. I try to keep a nice, solid, dark green color. If they are lighter green they need more nutes. Also keep those pots wet in bloom. Your trics will dry out and disappear if the pot dries out too much.So I was reading thru here again and thinking of ordering some Aquagold or maybe I should just get Potassium Sulfate to supplement Jacks Citrus.
Aquagold is $61 for 25lb bag shipped:
https://www.martinsproducesupplies.com/fertilizer/jacks-7-15-30
Or $6 for 1lb of Potassium Sulfate.
I still have another 1.5lb tub plus what is left in my first tub of citrus so I dont need to order more just thought I should up the sulfur as the "secret nute for potency is sulfur" per @RM3
https://www.rollitup.org/t/jacks-jr-peters-nutrients.850683/page-2#post-11179751
I am not great at reading what plants need as I have only done this for a couple years now. I obviously rely heavily on research and input from here.
I posted before that I have not done too bad so far. I got over 1g/watt on 2nd grow and things have been decent looking:
https://www.rollitup.org/t/jacks-jr-peters-nutrients.850683/page-17#post-13283133
I just want to make it better and things are going well now that I switched to tap water (well) / RO mix (due to hard water 280ppm) with 3g/gallon Jacks citrus. I seem to get higher than expected PPM readings off my BL tester after mixing tap and RO water so I may need to increase the amount of Tap water to account for this inaccuracy.
Switched to 12/12 on 2/15 so not much to see but look healthy I think:
(Click thumbnail for full size)
Couple more pics:
https://www.rollitup.org/t/cob-grow-amnisia-cheese-sugar-something.931923/#post-13375790
I have been PHing to 5.8 which may be too low, at least I should start heading toward 6.0? 6.2? 6.5? for flower? or just vary between 5.8-6.0 or?
These are in 5g hempy buckets with coco (actually half are canna Terra, half canna coco). I have a hard time getting enough water in them for them to drain but I try.
Thanks for help.
mr. childs
Well-Known Member
could you go into a little detail regarding this? i have always been in the frame of mind that lower humidity & a drier medium in the last weeks is better for resin production with certain strains. i dont starve my plants though.
TimeToBurn
Well-Known Member
I am certainly no pro and depending on your opinion of "last weeks", you could be right. But during the bloom period when they are drinking up water quickly, I notice my trics dry up and shrivel if my pots get light. The plants weren't drooping except a few small inner leaves but pots got dry enough that I saw my tric production halt and half disappear on the plants that got too dry. When water uptake slows in the last 2-3 weeks, I do slow with watering but that's because the pots were staying moist. I'll have to let them dry out more during the last 2 weeks like you say and see if they maintain more resin
mr. childs
Well-Known Member
you think that when the pots dry out & the trics shrivel, that they are losing the water molecule? are the different strains you run known to be oily, known for their resin gland production? i kinda of cheat when it comes to resin gland density & coverage by using uvb though, i have just never seen the glands shrivel, but now that you mention i will pay closer attention. thank you for helping me to learn.
TimeToBurn
Well-Known Member
Yes my strains are usually covered in trichomes all over the buds and leaves. When a few went dry, I saw all the trics on the bigger leaves shrivel and mostly disappear. They came back in the last month of growing but could have been better. I want to try your technique of drier pots during the last weeks cause I do find the last couple of weeks I lose some density in my trics. I figured the buds were just filling out more.
mr. childs
Well-Known Member
if the trichs disappeared, where did they go? theyre resin glands, oil in a sense, you think they soaked back in to the leaves? in my times of growing i have outright tortured some plants, ruined some cures, ultimately learning by destruction. through it all i have seen that less is more. i plan on using the jacks hydrangea blue mixed with the citrus, for the sulfur content in the blue. hopefully i dont destroy without learning.
It has been working this time for me. I dont add anything else except as I said ive added Sulfur at end. I just bought a 3lb jacks tomato and 4lb all purpose for veg garden.
IDK how good they look but there not dead and seem to be doing better than normal (more pics in link below). I have switched things up a bit doing hempy buckets, watering differently and made my light smaller so it is hard to compare to past grows. But I always had issues which I feel had to do with my water but there were likely also other reasons. My water is now 380 so that is pretty hard. Using this cheapo RO and mixing with tap (well) water seems to be working.
Also it never really dries out with hempy buckets. I normally water every 3 days but have gone 4 and 5 days between watering and things just do OK.
I just watered 48 hours ago and could water again now but think will do tomorrow. But I will keep top 3 day watering as I get toward end here. Only downside to hempy buckets is it is sort of a PITA vacuuming out runnoff but feel this grow has gone well so will stick with it and try to dial things in.