Plant has developed a deficiency, what is it?

Hi all, I grow in soil, one of my plants has developed this problem but others are unaffected, just curious if you have any idea what's going on? I am losing the big fan leaves because of this now

Thanks kindly

deimos phobos said:

Hi all, I grow in soil, one of my plants has developed this problem but others are unaffected, just curious if you have any idea what's going on? I am losing the big fan leaves because of this now

Thanks kindly

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Looks like calcium are u using ro water or tap water?
Calcium deficiency in weed flowers can be caused by various factors such as imbalanced pH levels in the soil, inadequate nutrient uptake due to root damage or poor soil conditions, excessive potassium or magnesium levels which can interfere with calcium absorption, or environmental stressors like temperature fluctuations or improper watering practices.
So these are some things that can cause it ^ or you ain’t adding enough calcium.
Next feed check run if your runoff ph is in rage you might just need to add a rich calcium supplement

I would call magnesium deficiency. The interveinal chlorosis is a Mg def sign.
Also the red stems on leaves is often a sign of magnesium deficiency also. Phosphorus deficiency can turn the stems red too.
The darker spots there could be just further progressed Mg deficiency.

Since it's the only plant showing this, check if it is the closest to the light? Could be just getting bit more light than it can handle, since it's progressing from down up, instead of burning the very top leaves.
Other than that depends are the rest of the plants same clones or different strains?
Could be just more hungry than the other ladies.

The above point about calcium, magnesium and potassium is a valid point. Too much of any of them, reduces the amount it gets the other two.
So overdoing calcium and potassium could lead to magnesium deficiency, even if there is enough magnesium in the soil.

Did it first show at the top or bottom? Top is calcium, bottom is magnesium deficiency.

But you also have light tip burn which is caused by salt stress/overfertilization. If that is the case then the whole root zone is out of whack and the cations (Mg, Ca, K) are not taken up in the right amounts. This shows as deficiency but is in fact oversupply.

It was the lower leaves and is making it's way up! I just added a tablespoon of epsom salts to 5L of water, is this typically a suitable amount to experiment with?

Sadly I'm not aware of anything I can do about overfertilizing them as I do not feed them salts and was using the food from the soil itself still ( KIS Mix Blended Soil | Black Swallow Living Soils, Brantford ON (blackswallowsoil.com) ) and that's why i was wondering if it was a hunger thing too, should I start feeding it more Gaia Power Bloom? But now Lou66 says it's an oversupply and I'm double confused! The soil is an all-in-one widely regarded and well known soil, so I was very light on feeding it anything so far.. To date it was mostly microbes, water, and some additives at random intervals such as aloe flakes, kelp, molasses

Should I just start with adding epsom to my water? I haven't done anything yet, lights are still off

thank you everybody for replying so far!

I am using tap water, with these stats:



and I pH my water to 6.5 even though they say pH is not needed I do it anyways because out of the tap it comes out around 8!
All plants are equipped with functioning Blumat carrots and 3 drippers - they seem to be quite happy up until literally now! I've never had a runaway leak or anything like that

Location is Waterloo, ON, Canada

Thanks again