ChikiPox
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General Organics nuts, BioThrive (Veg/Bloom) + CaMg + PH Up. (I set the nuts+water the night before feeding).
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Medium: Pro mix + Perlite. Soil PH: 7
THE HORROR: Didn't flush this grow before until this happened. Flushed the day after I noticed the burn, and 1 week later with minimum nuts, NO PH Up correction this time.
Day after burn: The drainage water PH during flushing was 7.4
1 week later: The water + nuts was PH 4.8 (without the PH Up). The drainage PH was 7.1 (Waiting for results, no nutrient burn 24hr later).
That ph is high for soilless. I think it should be about 6.2 in flower(? I think I did 5.8 in veg, and 6.2 in flower).
I’m no expert but it looks like you gave them too much and they locked other nutrients out. I don’t think “flushing” is a good idea in flower. I would just wait till the soil gets really dry. Get some good water (distilled is good). Only put half the bloom nutrients (3-4 ML ) and P.H your water to 6.3-6.5. I’d do that a couple times. I wouldn’t be expecting the leaves to turn back to normal though. That’s how I would approach it. Don’t know if there are any better options to take while flower like that. Good luck
I should have asked: which pro-mix are you using? I assumed it's HP or BX (soilless) because you talked about feeding in veg. But, if it's one of the soils with nutrients built into it, you could have salt buildup. It might have nothing to do with the 10ml increase. You could have been at the tipping point already. The dolomite could have been activating in response to lowering ph. Then you flushed, and you're left with an over-rebounding soil.(?)
It's strange that you've grown this way before without problems, right? Something must have changed. But, all you notice is the ph of your nutrient mix is lower? Maybe those "bio" bottles have a shelf life?
First you must flush the soil very well! Use water pH'ed to 6.5Hello!
I'm new in here, I don't know what's happening.
I'm growing 3 different strains (Critical, Lemon Zkittle, Blue Dream). Same feeding, PH, etc. for all but only the blue dream has this severe problem since mid bloom.
I only use 3 nuts in all my grows ( the rest is in medium): General Organics nuts, BioThrive (Veg/Bloom) + CaMg + PH Up. (I set the nuts+water the night before feeding).
I used before the PH corrector. My nuts are no more than a year old, but I noticed a PH of 4.3 with water in this grow (turn more acid with time?).
I started rising the nuts to 5.5-5.9 with water. Testing the medium, water, nuts. to stay in PH 6.5 - 6.9 overall. (No problems since 2 grows ago).
In early bloom I wait the signs of any lack of NPK to rise the nuts in flowering stage as advertised. Only feeding with CaMg (5ml) + BioThrive Bloom (5ml)/ Gal. at the moment everything perfect. I rise to 10ml/Gal. of BrioTrive Bloom only. The days after I noticed nut burn with all the plants. A Little Bit, but the BlueDream was kind of worse.
I flushed everything with clean water for 2 days and start only feeding with BioThrive Bloom 5ml/Gal. again. The burn stopped but the problems went in other direction.
The behavior is not like a mobile deficiency and is only happening in 2 plants, the rest is fine except for minimum nutrient burn.
THE HORROR: Didn't flush this grow before until this happened. Flushed the day after I noticed the burn, and 1 week later with minimum nuts, NO PH Up correction this time.
Day after burn: The drainage water PH during flushing was 7.4
1 week later: The water + nuts was PH 4.8 (without the PH Up). The drainage PH was 7.1 (Waiting for results, no nutrient burn 24hr later).
(JUST GUESSING THE PROBLEM IS THE SALT FROM PH UP + TOO MUCH NUTRIENTS).
Hope can help, thank you for reading!
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Medium: Pro mix + Perlite. Soil PH: 7
RO water with PH: 6.8-7.1
Temps: 24ºC - 29º C (HOT DAYS: 32ºC MAX.)
Humidity: 45- 55% (HOT DAYS: 70% MAX.)
Smart Pots: 5gal.
That is not correct. Please be careful of the advice you take or you will make a bad issue worse quickly.Probably is not a good idea to flush in the mid of flowering, but reading and hearing from other growers is a quick way to correct if the lockout if it is evident. I'll not be surprised to miss something really important. Thanks for your comments!
Sorry, I miss the "+" at the end, must be more clear the soil info. Is PROMIX (50)+ SOIL/COMPOST (35)+ PERLITE (15).
Definitively I need to rethink my medium and nutrients. That's why I like the community, I want to do the best way.
First you must flush the soil very well! Use water pH'ed to 6.5
How you apply and mix your nutrients and water wasn't completely clear to me, however let me tell you a basic practice of mixing nutrients which might help you:
Your start with tap water, you add the nutrients that you're planning to use to the tap water, then you adjust the pH to 6.5 (not 6.5 - 7.0 too high).
After I flushed that plant I would feed it the next time it was dry, also I would recommend you begin using Dolomite lime to eliminate such problems in the future, search it and use as directed for best results
Hope this helps and if I can answer anything else just ask, good luck!
I use Reverse Osmosis Water, the tap water is too hard for the plants.
First I add CaMg+ 5ml/Gal.
That sounds fine for the nutrients you were using. However, if the Pro-Mix was one of the products with nutrients already in it, I don't think you needed to add compost. And, if it had nutrients in it, that complicates how you feed.
I use Pro-Mix HP (soiless, doesn't have any organically active material added to it. That's the stuff I thought you were using). I add 25% potting mix to make it (technically) a soil, and 25% more perlite because I think cannabis likes light/airy soil, fast wet/dry cycles. I documented it here (<<link) if you'd like to see more about it. There's nothing special about it. I'm sure others have soils they like. I use "HP" which is high porosity. Others use use BX. It has less perlite, and adds vermiculite which keeps the soil wet. They add compost to theirs, making it more like a soil (the way I do HP). You basically did the same thing, but it sounds like you started with a soil version of Pro-Mix, with nutrients already added to it. Maybe feeding that caused you a problem.
Hello Guys!
@az2000 @Steve705 @Beachwalker
I found the culprit.
Was the water PH.
It's hard for me to understand how water ph matters in soil. If you start with 150ppm water, there's not much buffering in it. It shouldn't take much ph-up/down to move its ph. The soil has far more buffering in it to pull the water's ph to it (not the other way around).
Adding nutrients to the water creates more buffering. If the nutrient solution is very strong, it can take a considerable amount of up/down to move it. That ph "strength" could move the soil ph more.
I haven't ph'ed my water nor nutrient solution in 4-5 years. Never any problems. I mix 1 to 1.5 tablespoon dolomite lime into each gallon of soil. Maybe that makes a difference,
It's hard for me to understand how water ph matters in soil. If you start with 150ppm water, there's not much buffering in it. It shouldn't take much ph-up/down to move its ph. The soil has far more buffering in it to pull the water's ph to it (not the other way around).
Adding nutrients to the water creates more buffering. If the nutrient solution is very strong, it can take a considerable amount of up/down to move it. That ph "strength" could move the soil ph more.
I haven't ph'ed my water nor nutrient solution in 4-5 years. Never any problems. I mix 1 to 1.5 tablespoon dolomite lime into each gallon of soil. Maybe that makes a difference,
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