Leaf signs o

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ifoodhippie

Member
Hey! Noticed these sick leaves 2 weeks ago, tried reducing nutes/adding calmag but didn't work... Can you guys help me diagnosing the problem here?

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Grow infos:

Genetics: Bubba Cheesecake from Seedsman
5 weeks into flower

Outdoor with direct sunlight, moved into the garage if it rains, so they get a cover/shade, still receiving 400-500 lux.

Peat 40% perlite 40% worm castings 20% + bat guano, lime and bokashi (never added castings, guano or lime again, just bokashi 20d ago or so)

Biobizz nutes - BioGrow 2.5ml/L, BioBloom 4ml/L, BioHeaven 2.5ml/L, Alg-a-Mic 2.5ml/L, TopMax 2ml/L

Was giving 1500ppm - now its 1100-1200

pH - Tap water: 7 pH // with nutes 4.8 pH, then I add baking soda until 6.2-6.3

Watering every 3-4 days

RH 70%+ all day everyday, I have a big fan blowing on their top side 24/7.

Temps from 21 to 24ºC
 
Billy the Mountain

Billy the Mountain

Well-Known Member
ifoodhippie said:
Hey! Noticed these sick leaves 2 weeks ago, tried reducing nutes/adding calmag but didn't work... Can you guys help me diagnosing the problem here?

View attachment 5325455View attachment 5325456View attachment 5325457View attachment 5325458

Grow infos:

Genetics: Bubba Cheesecake from Seedsman
5 weeks into flower

Outdoor with direct sunlight, moved into the garage if it rains, so they get a cover/shade, still receiving 400-500 lux.

Peat 40% perlite 40% worm castings 20% + bat guano, lime and bokashi (never added castings, guano or lime again, just bokashi 20d ago or so)

Biobizz nutes - BioGrow 2.5ml/L, BioBloom 4ml/L, BioHeaven 2.5ml/L, Alg-a-Mic 2.5ml/L, TopMax 2ml/L

Was giving 1500ppm - now its 1100-1200

pH - Tap water: 7 pH // with nutes 4.8 pH, then I add baking soda until 6.2-6.3

Watering every 3-4 days

RH 70%+ all day everyday, I have a big fan blowing on their top side 24/7.

Temps from 21 to 24ºC
Click to expand...
Baking soda is a poor choice to raise pH as it contains sodium and it's a weak base requiring a lot of it compared to alternatives.
Potassium bicarbonate or Potassium Silicate would be better choices to raise the pH.
Plant looks fried from overfeeding and/or pH problems.

A half-full comment: At least it's not septoria. Septoria is very distinctive, and that ain't it.
 
I

ifoodhippie

Member
Billy the Mountain said:
Baking soda is a poor choice to raise pH as it contains sodium and it's a weak base requiring a lot of it compared to alternatives.
Potassium bicarbonate or Potassium Silicate would be better choices to raise the pH.
Plant looks fried from overfeeding and/or pH problems.

A half-full comment: At least it's not septoria. Septoria is very distinctive, and that ain't it.
Click to expand...
I've started using baking soda recently after I saw some pH problems, and I'm keeping plants for a month-ish more, can 1/3 teaspoon of it turn into a real problem until harvest? Gonna look for the other suggestions anyway, thanks!

@edit: Can using potassium silicate or potassium bicarbonate affect the organic soil/microorganisms?
 
Last edited:
cannabiscrusader

cannabiscrusader

Well-Known Member
I ran biobizz for over a year. I found I had to add lime in my soil mix, and switch to 10g pots to keep the ph in check. That line up will drop the ph way low even after you adjust it.
 
I

ifoodhippie

Member
cannabiscrusader said:
I ran biobizz for over a year. I found I had to add lime in my soil mix, and switch to 10g pots to keep the ph in check. That line up will drop the ph way low even after you adjust it.
Click to expand...
Oh wow, I don't know if I can manage plants in 10g pots yet, they get monstrous. Can adding lime be helpful at this stage?
Btw, I'm using 3 and 5 gal pots for now.

hotrodharley said:
Phosphorus deficiency. Now you need to figure out why.
Click to expand...
Hmm, I'm adding very much BioBloom 2-2-1.5 (4ml/L) + BioGrow 3-0-4 (2.5ml/L), so quantity of nutes can't be.
The 6.2 pH water seems suited for P absorbtion, can the soil still be way lower on pH? What's a good way of testing the soil, considering I just have a pH pen (a cheap one, even)?
 
cannabiscrusader

cannabiscrusader

Well-Known Member
Bring the ph of your mix up to 7.2
This will give you a better buffer as the soil ph drops. Add lime next grow.

Drop your lights closer during the stretch to minimize the height when using bigger pots. Just remember to back them off around week 4
 
I

ifoodhippie

Member
sfw1960 said:
How's that going?
Click to expand...
Hey!

I managed to fix a bit of the problem by pH'ing the water every watering and had to chop them early due to pests anyway, sadly..

Dried them in a dry rack (never doing this again) and now curing, burping once or twice a day.

OG Kush strain has a VERY GOOD aroma and taste, although the others seem to have lost their scent, idk, let's wait for some weeks into curing..

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sfw1960

sfw1960

Well-Known Member
Mmmmm CBD nugs!
Glad to hear you got it under control even if the buggus messed you up.
I bought one of those fold up spring exploders for drying and yeah, NFW I'll use it again and I can't think of what to do with it either lol!
TOTAL waste of time, effort and money.
We have a pair of 4*8', and one each of 32*32", 4*4 & 2*4...
Generally the 2 smaller ones are great for hanging out for a week or so before they see jars and that works on great for preservation of terp town.
Thanks for the pictures!:weed:
 
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