canorganix
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Looks like pretty advanced potassium deficiency.
Do you let your plants sit in the run off?
hard to tell by the pictures, is it mostly the top leaves with the burnt edges?
I purchase the soil pre mixed from freedom farmers in south africa that already has coco and perlite mixed at a 90/10 ratio I then top dress with 45gr of grow after 3 weeks passed by from seed as they meee no nutes during the 1st 3weeks.What is the soil you are using? That has a lot to do with it. Also if you said you are adding coco and perlite, the coco may be at the heart of your issues if you are mixing and directly planting. Coco is alright in a soil blend if you can let it sit for a bit and really become a part of the soil, but if you mix and plant immediately I find problems tend to arise.
On to your nutrients, I am a bit confused here. Are you top dressing with the Greenhouse nutrients once and letting it go for 2 months before applying again? Are you mixing it directly into your soil blend?
How often are you watering? How much water are you giving each time? Is there runoff when you water?
No folia spray at all a light misting of ph water once a while but not often.Are you foiler spraying during lights on, could be burning.
light/heat stress,Yes it usually starts at the top having the most affected areas then works itself down. I added another pic that was 2 weeks ago the early stages of the problem
I purchase the soil pre mixed from freedom farmers in south africa that already has coco and perlite mixed at a 90/10 ratio I then top dress with 45gr of grow after 3 weeks passed by from seed as they meee no nutes during the 1st 3weeks.
I have not applied again as greenhouse grow amendments mention that you only top dress after 2months so the plants have only been receiving water.
Almost no runoff as I water with garden sprayer like 5percent runoff max.
I water the plants every 3days depending on if the pot is light or not some plants are drinking more water than others.
I also use a blue lab pulse meter to ensure I can check soil moisture to avoid over watering.
Firstly thanks for taking the time to assist a fellow grower.
The soil that im using is premixed see attached link:
Organic Classic
Ingredients: Coco Coir, Worm Castings, Compost, Perlite (10%), Vermiculite, Volcanic Rock Dust, Bone Meal, Gypsum, Fermented probiotic bran, Organic nutrients
Application:
– Ideal for container growing
– Indoor, Greenhouse or Outdoor cultivation
– Quality organic potting soil for vegetables, herbs and general plants
– Raised bed system re-planted over multiple cycles (No-till, covercrop)
– Cultivation of organic medicinal grade CBD plants
The Organic Classic blend is formulated mainly for organic growing practices and organic nutrients. Compared to the Formula 1 mix, the Classic has a greater Cation exchange capacity (CEC), higher active organic matter content, as well as a balanced semi-slow release organic nutrient component. It will also hold water longer than the Formula1 mix. Substrate pH 6.5.
First watering can either be clean water or for hungrier plants add a single recommended dosage of organic nutrients. The nutrients in the soil should be adequate for approximately 2-6 weeks before additional nutrient applications are required.
The temps in my soil currently is 22.5c which isn't hot i presume...
The nutrients description see attached link: https://shop.greenhousefeeding.com/bio-grow-en.html
BioGrow
How to use:
BioGrow needs to be mixed into the substrate. It can be used in soil,
coco or similar substrates.
It can be mixed at the time of transplantation or added later as top
dressing (mixed into the top layer of the soil)
The nutrients will be released constantly during a period of 8
weeks.*
*If the growth period is less than 8 weeks or the substrate is
pre-fertilized, doses should be decreased. Use half dosage for seedlings
and young plants (2-3 weeks old). If the growth period is longer,
a second application is required (as top dressing).
Dosage:
Vegetative growth:
3g per Liter substrate
Mother plants:
2-3g per Liter substrate every two months (as top dressing)
My pots are 15ltr pots which equals to 3gr X 15=45gr top dressing every 8weeks... Is this product not giving me proper information on their feeding regime or am i being ripped off as its very expensive.
I am not an experienced grower as this is my 2nd year in growing and wish to grow organically and thought top dressing is the easiest way for a beginner in organics.
I hope this give you enough background to diagnose my problem..
Is potassium demand high in veg stage of the plant as I just checked the npk values for bio grow 7-2-4.. should I supplement with some seabird gauno or add banana peel to top of soil and water every other day as I have read about ot providing a constant supply of potassium...
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