Please help: Loosing my sour diesel to nutrient problems

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ugmjfarmer

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Hello-

I am running Sour Diesel from clone. The plants pictured are one month old from clone. Each one is in rockwool, cloned in 2" blocks and transplanted into 4x4x2.5" blocks. After cloning I put them on the same nutrient solution as my mothers which was 15ml/gal each part of Motherplant A+B and vegged them for a week. The PH was then 5.7 always, and the tank measured 1.8ec. They were dark green, perfect leaves without bends, looking beautiful as ever.

I then was talked into trying canna aqua. I mixed up the tank to the recommended 12ml/gal for veg which measured out to 1.7ec, but ph'd to 4.9! So i added PH up until the tank was 5.5 and let it sit. I then watered the plants and immediately my leaves started showing rust spots, chlorosis and praying for magnesium. They started burning almost instantly when canna hit their roots, within 1 hour of staring at them to be exact.

So I took the tray to the sink and flushed them out, then set the cube ph again with PH'd water to 5.5 and let them sit. I then mixed up the minimum solution of canna aqua a+b of 8ml/gal and tested the tank again. 1.2ec, 4.9ph.. this was getting old. So much for canna, it wont dial. ;(

So I went to the store and picked up all 3 bottles of GH 3-Part Flora and the Floralicious+. I have tried 3-2-1, or 12-6-3 per gallon, or 5ml per gal each part and now 8ml/gal each part of GH but my plants are showing even further magnesium deficiencies and will not grow right at all!

My tap water measures .4 ec, and Ph is 8.7 when it comes out. my current tank of GH has the following in it:

8ml G/M/B
1ml Floralicious+
2.5ml/gal Sweet (epsom source)
2ml/gal Calmag

These are per gallon w/ 6 gallons total and 22 drops of Ph down total

This measures ec 1.8, ph 5.7

N 153
P 61
K 200
Ca 126
Mg 60
S 76
Fe 3.5
Mn 1
Zn .3
Cu .2
B .1
Mo .01
Co .01

What is going on here? PureBlendPro and I have no problems, but since switching to canna and now GH I cannot get these plants to grow green or normal at all. I have never had to purchase hard water nutrients, things just typically balance right when mixed up + or - a few drops of ph down or up.

Picture 1 is before the madness started. The rest are just 2 weeks later :mad0229: Help!
 
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G

Green Supreme

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Sounds like you should go back to Pure Blend. Seems to me most nutes will work, if the grower takes the time to figure them out. Most just see poor result and move on, never success cuz they never stick with one thing long enough to work it out. Peace GS
 
U

ugmjfarmer

156
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Yeah but GH 3-part is another standard that works well in most occasions. I can dial in the same NPK numbers using the 3 part as Pureblend, but the odd thing would be that pure blend numbers have less cal/mag than GH-3part.. For example.. a typical tank of pbpg with 5ml calmag+ would have:

N 209
P 52
K 202
Mg 46
Ca 102

so my numbers dont sound so far off right now:

N 153
P 61
K 200
Ca 126
Mg 60
S 76
 
Seamaiden

Seamaiden

Living dead girl
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I don't work my nutrients like that, too formulaic for me, I fly by the seat of my pants and take notes. In any event, what I see is classic "Praying for Magnesium"! Foliar of MgSO4 (Epsom salt) @ 1/4 teaspoon/gallon, should fix 'em right up.
 
xX Kid Twist Xx

xX Kid Twist Xx

Premium Member
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i agree with seamaiden up you cal-mag to 7-10 ml per gallon soon as it gets dark go down to around 5ml. did u just move them under a differnt light(higer powered?) looks like they may be a little close to it if so or if they have gotten taller they are closer to the light as well.
 
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ugmjfarmer

156
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Went from T5 106w to a 400w HPS hung 16-18" above so yes, but that has been backed off.

I just mixed up some epsom spray w/ agri2 wetting agent and shut the bulb off for that to soak up. I'll give that a few days. My Mag/Cal numbers seem on, and the leaf veins were darkening up. I'll consider adding 3ml more calmag to the nutes if the spray does not darken them up.. the 2ml/gal has only been in there for a watering or so.
 
xX Kid Twist Xx

xX Kid Twist Xx

Premium Member
Supporter
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i would also add soem hygrozyme as i see some algea froming on the tops of your cubes. once you get it correct keep your cal-mag around 5 ml and you will never see this issue 2ml is not enough and defintly wont let you catch up. even in your post you are saying you keep noticing a mag deficency.
 
jimmyhoffa59

jimmyhoffa59

341
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That sucks man, look like you got problems and I heard Canna was good stuff. Those tiny ladies should only be getting like 1/4 strength anyways. If you can, get yourself a small RO filter so you can get your water in check too, 8.2 ph or whatever you said it nasty stuff. But to each their own, I feel for ya, how frustrating I hope you figure it out.
 
U

ugmjfarmer

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I took another test of my tap water and it is now coming out around 200ppm with a PH of 8.9. Furthermore, my city's "water hardness is reduced by adding lime and soda ash to the water, which reacts with dissolved calcium and magnesium to form calcium carbonate and magnesium hydroxide floc. The floc then settles out of the water in large settling basins, and any residual floc is removed via sand and gravel filtering. This process reduces the hardness of the water from approximately 411 parts per million (ppm) to about 85 ppm. The finished water is then chlorinated and fluorinated, and sent to storage prior to distribution."

The 85-100 was probably more true about 2 months ago. I guess with colder temperatures and winter the hardness climbs as well. Time to invest in an RO system.

Just to try before I buy, I'm going to pop 10 gals of RO water into my tank and let the system run and see where that gets me. Right now, the epsom spray had zero effect on the ladies. Am I wrong to think that the excess hardness/calcium now present in my water is locking out magnesium perhaps and that adding calmag will not fix this problem?
 
Seamaiden

Seamaiden

Living dead girl
23,596
638
Excess hardness can bring on lock outs, yes. I'd give the Epsom foliar a few days and a few tries. Magnesium is an immobile element, which is why deficiencies are seen on lower (older) leaves, and it does not 'fix' quickly. Nor will affected leaves really come back.

You ask a very pertinent question, and I think you're on the right track. Remove the source water as a problem, then reassess.
 
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