Help with light and nutrients

[tomatoesarecooltoo]

i apply approx 22 drops of ecothrive neutralise, which is a pure vitamin c liquid supplement used to neutralise tap water and removed cholrine and chloramine instantly. You apply 1 drop per litre so 5 gallons are roughly 22 litres, hence why i had 22 drops first.
I then use bio bizz ph down organic citric acid to lower ph to 6.2 / 6.3.

Vitamin c = citric acid so you probably don’t need both products

 

[tomatoesarecooltoo]

My personal guess is microbial imbalance, overly bacterial dominant soil will shift the absorption range towards towards acidic.

 

[Lnp32]

Why are you putting any ph down in your feed growing in a peat based mix?- you're probably acidic as hell, yes even with balanced feed.- besides there is buffer in the soil- ph of water doesn't matter. Measure your runoff. Some people might argue its not as accurate as a slurry, but if your runoff is really acidic- you know you have a problem.

I had this issue for years, and never could figure out why I was pulling my hair out trying to get my ph back up halfway through bloom. The fix- stop phing my water down to 7 - even at over 8 ph! And I also added more dolomite lime to my mix prior to potting- all problems gone.

Ffof, canna terra, roots organix, and even soilless promixhp, anything with peat wants to be acidic. Companies add buffers like sea shells and lime, but often not enough.

Dont use wood ash or calcitic lime to raise ph btw- it will cause problems.

If you're halfway through the round, take a couple tablespoons of dolomite lime and mix it with just a cup or so of soil. Top dress evenly and water to saturation- after about ten days you will start to see a difference.

i always thought i didnt have to ph when growing organically in soil. But the guy in the shop told me to use bio bizz ph down anyway just to keep it in the 6.2 6.5 range.
Do you think i should just use the vitamin c to extract the chlorine and chloramine without phing ? Or should i not use the vitamin c extract and just ph the water using the bio bizz ph down ?

 

[Lnp32]

look at the back of the leaves and see if you find any mites or little insects. From your previous pictures and your current i also see tip burns an indication that you are feeding to hard. You might wanna kick back a bit on your nutrients.

ive had a look at the leaves and no sign or pests.
I really havent given them that much food.
I like to top dress carefully by using less than too much. I literally only gave each pot 10ml too dress of palm tree ash to try and raise soil ph a tiny bit. I might order some dolomite lime as that will stabilise the ph better than the palm tree ashes

 

[HarryHood]

My personal guess is microbial imbalance, overly bacterial dominant soil will shift the absorption range towards towards acidic.

how would you remedy that?

 

[Fresh14]

how would you remedy that?

Have you looked at leaf septoria?