Can't Stabilize PH in Soil

Killgrave

Member
Hi everyone, thanks in advanced for the help given. To describe my problem i'll start from the begining to the date as detailed as possible.

On May/01 i planted my 4 seedlings each in a 20L pot, they are 3 London Cheese and 1 Lemon Haze from BSF Psycho Auto Mix.
At about week 3 the plants started to show some yellowing in some leaves, at the time i attempted to fix it by adding a little extra food in the week schedule which btw started on week 2. (Photo of the leaves) *the shining slots in the leaf is residual from an organic pesticide named VAMP*
Yellowing.jpg

On week 4 the yellowing didn't get better it actually had gotten worse and some other symptoms came up, this was what i believe was Calcium and Magnesium deficiency. Up to this point the plant was the first 2 weeks just eating the soil with nothing added to it, on week 3 i started feeding with Powder Feeding from Green House and some extra Trichoderma once a week and 2 times a week only PH 6.1 - 6.3 water, and planted some Trifolium Repens (White Clover) on each pot. (Photo of deficiency)
Mag deff.jpg
Calcium def.jpg

At this point (end of week 4) i decided to measure runoff PH after giving it its water dose, all the plants had a runoff PH of 4.3, 4.7, 5.0, 4.9 which i tried fixing by giving them twice de amount of water with PH at around 8.3 with the resulting runoff still being in the same range as before (around 4.5).
I panicked and proceeded to do root washing with a product that works by dissolving salts and other debris in the soil, in the measures told by the product (1ml per 1L of water for mixing and 1L of mixed product per 2L of soil); after washing, i added some organic fertilizer (9-4-8 instead of continuing with salts (powder feeding) at 6.2 PH and to my surprise, the runoff was now in the 4.6-5.0 range. so i decided to let the soil dry out a little before trying another root wash. (photo of the plants at end of week 4)
Burned.jpg
Hojas 1.jpg

Now at the beginning of week 5 i got desperate and added some earthworm humus and some Dolomite Lime to the soil (1gr per 1L of soil) and covered it with some extra soil; most Trifolium Repens died but some survived. Runoff water still in under 5.0 PH range when giving it at 6.2 PH, only water.

Seeing no change i decided to try a more in depth root wash 2 days ago since it did show some change the first time. This time i used a 200L per hour water bomb during 1 full hour per plant, of course letting it drain every 20 minutes until it stopped dripping; and just to make sure i also did a 10L wash per plant with the root washing product used before at PH 9.0 and measured the runoff. It now was in the 4.6 - 5.5 PH range.

I think i hit a wall, the plants are twice the size the pot now and i'm slowly loosing hope, they are still not in flowering tho.
i'll hear everything that might help my baby's get better, Thanks again and have some nice smokes.

Edit: For those wondering the soil came in 5.8 - 6.2 PH range and contains Perlite, Trichoderma, bark, Peat, Yeast, Yucca, Zeolite, Azospirillum, and Bone Meal.

Edit 2: Just finished giving the plants some 9-4-8 Fertilizer. Some extra info taken. June/10:
Tap Water:
PPM 150 - EC 300
PH 7.5

Fertilized Water:
PPM 600 - EC 1500
PH 6.6 (PH up to 11, little change in PPM/EC values)

Water given to plant:
PPM 642 - EC 1590
PH 10.92

Runoff Water:
PPM 170- EC 340
PH 6.5
 
Last edited:

newcayney2008

Well-Known Member
Hi everyone, thanks in advanced for the help given. To describe my problem i'll start from the begining to the date as detailed as possible.

On May/01 i planted my 4 seedlings each in a 20L pot, they are 3 London Cheese and 1 Lemon Haze from BSF Psycho Auto Mix.
At about week 3 the plants started to show some yellowing in some leaves, at the time i attempted to fix it by adding a little extra food in the week schedule which btw started on week 2. (Photo of the leaves) *the shining slots in the leaf is residual from an organic pesticide named VAMP*
View attachment 5298506

On week 4 the yellowing didn't get better it actually had gotten worse and some other symptoms came up, this was what i believe was Calcium and Magnesium deficiency. Up to this point the plant was the first 2 weeks just eating the soil with nothing added to it, on week 3 i started feeding with Powder Feeding from Green House and some extra Trichoderma once a week and 2 times a week only PH 6.1 - 6.3 water, and planted some Trifolium Repens (White Clover) on each pot. (Photo of deficiency)
View attachment 5298511
View attachment 5298512

At this point (end of week 4) i decided to measure runoff PH after giving it its water dose, all the plants had a runoff PH of 4.3, 4.7, 5.0, 4.9 which i tried fixing by giving them twice de amount of water with PH at around 8.3 with the resulting runoff still being in the same range as before (around 4.5).
I panicked and proceeded to do root washing with a product that works by dissolving salts and other debris in the soil, in the measures told by the product (1ml per 1L of water for mixing and 1L of mixed product per 2L of soil); after washing, i added some organic fertilizer (9-4-8 instead of continuing with salts (powder feeding) at 6.2 PH and to my surprise, the runoff was now in the 4.6-5.0 range. so i decided to let the soil dry out a little before trying another root wash. (photo of the plants at end of week 4)
View attachment 5298517
View attachment 5298518

Now at the beginning of week 5 i got desperate and added some earthworm humus and some Dolomite Lime to the soil (1gr per 1L of soil) and covered it with some extra soil; most Trifolium Repens died but some survived. Runoff water still in under 5.0 PH range when giving it at 6.2 PH, only water.

Seeing no change i decided to try a more in depth root wash 2 days ago since it did show some change the first time. This time i used a 200L per hour water bomb during 1 full hour per plant, of course letting it drain every 20 minutes until it stopped dripping; and just to make sure i also did a 10L wash per plant with the root washing product used before at PH 9.0 and measured the runoff. It now was in the 4.6 - 5.5 PH range.

I think i hit a wall, the plants are twice the size the pot now and i'm slowly loosing hope, they are still not in flowering tho.
i'll hear everything that might help my baby's get better, Thanks again and have some nice smokes.

Edit: For those wondering the soil came in 5.8 - 6.2 PH range and contains Perlite, Trichoderma, bark, Peat, Yeast, Yucca, Zeolite, Azospirillum, and Bone Meal.

Edit 2: Just finished giving the plants some 9-4-8 Fertilizer. Some extra info taken. June/10:
Tap Water:
PPM 150 - EC 300
PH 7.5

Fertilized Water:
PPM 600 - EC 1500
PH 6.6 (PH up to 11, little change in PPM/EC values)

Water given to plant:
PPM 642 - EC 1590
PH 10.92

Runoff Water:
PPM 170- EC 340
PH 6.5


[ Disclaimer: ]

I am A hobbyest. I do not spell perfect, use or write perfect English. My statements may not be all 100% correct for the reason that I had to ask or reasearch the same questions you are wanting the answers to. ( I do not know if the answers I found were correct. )

If I seem areagant (sp.?) I probably think its funny. If I seem like A ass, I am.

So anyway, you prob. got no responce yet because it is hard to answer 10 ?s that are not real eas to answer unless you are very knowlegeable in Horticulture of Anual plants, some science, some types of weed variants, phototypes, cultivars, etc. I could not begin to tell you what you are asking?? I am A Newbie also at 7 years, Photo. and Auto, With almost 30 stalks behind me 3 or 4 at A time.

What I am going to suggest you may not be able to do? ( If I was A gambling man [ And I am. ] Is #1 Do not wash the roots again. [ suprised they are still alive now. ] #2 Slow Your Roll, or you wont have one. L.O.L.
Now, the easy part.
THE GROW.

PROMISE.; Do it this way on this grow. You wil pull it through AND get A big knowlege base of
how the system works.

#3 Have all matierials needed at start of project. if you are missing an item do not even start your project.[ MANDATORY ] You are not ready.
IF READY PROCEED.

A.) 3 Gal. pots use what you prefer.
B.) Miracle Grow PREMEUM p0p 6 Month feed.
( option? Wont work
your way. YOU PLAN
 

DCcan

Well-Known Member
Water given to plant:
PPM 642 - EC 1590
PH 10.92

Runoff Water:
PPM 170- EC 340
PH 6.5
Watch the EC runoff, not the PH.
Chasing PH runoff is pointless, checking EC runoff has a purpose.
Just PH the input, it changes when reacting with elements in the soil, let the plant deal with it.

Ph above 10.5 is hyper alkaline, right up there with chlorine and ammonia.
 
Last edited:

curious2garden

Well-Known Mod
Staff member
Watch the EC runoff, not the PH.
Chasing PH runoff is pointless, checking EC runoff has a purpose.
Just PH the input, it changes when reacting with elements in the soil, let the plant deal with it.

Ph above 10.5 is hyper alkaline, right up there with chlorine and ammonia.
^^ this
1686483954142.png
 

harris hawk

Well-Known Member
Hate to rain on your parade _ have never "PH"-ed in all my years --- look at your nutrients and feed x's per week and soil type your answer is in there
 

Hollatchaboy

Well-Known Member
[ Disclaimer: ]

I am A hobbyest. I do not spell perfect, use or write perfect English. My statements may not be all 100% correct for the reason that I had to ask or reasearch the same questions you are wanting the answers to. ( I do not know if the answers I found were correct. )

If I seem areagant (sp.?) I probably think its funny. If I seem like A ass, I am.

So anyway, you prob. got no responce yet because it is hard to answer 10 ?s that are not real eas to answer unless you are very knowlegeable in Horticulture of Anual plants, some science, some types of weed variants, phototypes, cultivars, etc. I could not begin to tell you what you are asking?? I am A Newbie also at 7 years, Photo. and Auto, With almost 30 stalks behind me 3 or 4 at A time.

What I am going to suggest you may not be able to do? ( If I was A gambling man [ And I am. ] Is #1 Do not wash the roots again. [ suprised they are still alive now. ] #2 Slow Your Roll, or you wont have one. L.O.L.
Now, the easy part.
THE GROW.

PROMISE.; Do it this way on this grow. You wil pull it through AND get A big knowlege base of
how the system works.

#3 Have all matierials needed at start of project. if you are missing an item do not even start your project.[ MANDATORY ] You are not ready.
IF READY PROCEED.

A.) 3 Gal. pots use what you prefer.
B.) Miracle Grow PREMEUM p0p 6 Month feed.
( option? Wont work
your way. YOU PLAN
Ph 10.92?!?! That's damn near like watering with straight ph up! :p
 

Killgrave

Member
Watch the EC runoff, not the PH.
Chasing PH runoff is pointless, checking EC runoff has a purpose.
Just PH the input, it changes when reacting with elements in the soil, let the plant deal with it.

Ph above 10.5 is hyper alkaline, right up there with chlorine and ammonia.
So i should keep giving them they normal schedule on 6.2 PH regardless of the runoff? What should i keep an eye out on EC?
The only reason got panicked was because i was told that runoff should not be much more different from the given water
 

Wastei

Well-Known Member
Hi everyone, thanks in advanced for the help given. To describe my problem i'll start from the begining to the date as detailed as possible.

On May/01 i planted my 4 seedlings each in a 20L pot, they are 3 London Cheese and 1 Lemon Haze from BSF Psycho Auto Mix.
At about week 3 the plants started to show some yellowing in some leaves, at the time i attempted to fix it by adding a little extra food in the week schedule which btw started on week 2. (Photo of the leaves) *the shining slots in the leaf is residual from an organic pesticide named VAMP*
View attachment 5298506

On week 4 the yellowing didn't get better it actually had gotten worse and some other symptoms came up, this was what i believe was Calcium and Magnesium deficiency. Up to this point the plant was the first 2 weeks just eating the soil with nothing added to it, on week 3 i started feeding with Powder Feeding from Green House and some extra Trichoderma once a week and 2 times a week only PH 6.1 - 6.3 water, and planted some Trifolium Repens (White Clover) on each pot. (Photo of deficiency)
View attachment 5298511
View attachment 5298512

At this point (end of week 4) i decided to measure runoff PH after giving it its water dose, all the plants had a runoff PH of 4.3, 4.7, 5.0, 4.9 which i tried fixing by giving them twice de amount of water with PH at around 8.3 with the resulting runoff still being in the same range as before (around 4.5).
I panicked and proceeded to do root washing with a product that works by dissolving salts and other debris in the soil, in the measures told by the product (1ml per 1L of water for mixing and 1L of mixed product per 2L of soil); after washing, i added some organic fertilizer (9-4-8 instead of continuing with salts (powder feeding) at 6.2 PH and to my surprise, the runoff was now in the 4.6-5.0 range. so i decided to let the soil dry out a little before trying another root wash. (photo of the plants at end of week 4)
View attachment 5298517
View attachment 5298518

Now at the beginning of week 5 i got desperate and added some earthworm humus and some Dolomite Lime to the soil (1gr per 1L of soil) and covered it with some extra soil; most Trifolium Repens died but some survived. Runoff water still in under 5.0 PH range when giving it at 6.2 PH, only water.

Seeing no change i decided to try a more in depth root wash 2 days ago since it did show some change the first time. This time i used a 200L per hour water bomb during 1 full hour per plant, of course letting it drain every 20 minutes until it stopped dripping; and just to make sure i also did a 10L wash per plant with the root washing product used before at PH 9.0 and measured the runoff. It now was in the 4.6 - 5.5 PH range.

I think i hit a wall, the plants are twice the size the pot now and i'm slowly loosing hope, they are still not in flowering tho.
i'll hear everything that might help my baby's get better, Thanks again and have some nice smokes.

Edit: For those wondering the soil came in 5.8 - 6.2 PH range and contains Perlite, Trichoderma, bark, Peat, Yeast, Yucca, Zeolite, Azospirillum, and Bone Meal.

Edit 2: Just finished giving the plants some 9-4-8 Fertilizer. Some extra info taken. June/10:
Tap Water:
PPM 150 - EC 300
PH 7.5

Fertilized Water:
PPM 600 - EC 1500
PH 6.6 (PH up to 11, little change in PPM/EC values)

Water given to plant:
PPM 642 - EC 1590
PH 10.92

Runoff Water:
PPM 170- EC 340
PH 6.5
You need to buffer your medium. Your runoff is way off if it's 170ppm with 640ppm as input! The medium leaches all of the nutrients that's supposed to go to the plant and the pH crashes as a result.

Stop with all the organic inputs, it will only worsen your problems with all the organic acids lowering pH even further. Potassium silicate, bicarbonate or Calcium carbonate would help to raise pH and stabilize the medium.

Like other suggested it might be your source water that is the main problem. I would try to make a nutrient solution, put it with a small airstone and try to experiment and make it pH stable for longer periods of time.
 

Killgrave

Member
You need to buffer your medium. Your runoff is way off if it's 170ppm with 640ppm as input! The medium leaches all of the nutrients that's supposed to go to the plant and the pH crashes as a result.

Stop with all the organic inputs, it will only worsen your problems with all the organic acids lowering pH even further. Potassium silicate, bicarbonate or Calcium carbonate would help to raise pH and stabilize the medium.

Like other suggested it might be your source water that is the main problem. I would try to make a nutrient solution, put it with a small airstone and try to experiment and make it pH stable for longer periods of time.
i'll try that, thanks.
What possible problems could relate to the water source? I have been thinking on buying a reverse osmosis kit but since i didn't exactly had problems on previous grows thought i could pass it.
 
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