Burned tips and spots

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testology1980

Well-Known Member
Hi all,

I am a beginner and this is my first plant.
I checked all the pinned threads and I am not sure what to do.. also the images are missing from some of them and the symptoms look similar to me...

Indoor 60 X 60
LED light 30 cm about the plant
Watering schedule - every day or two (I think i did it wrong)
Water is reverse osmosis
Growing Medium - Soil
Stage of growth - about 7 weeks grow
Temperature - 25-27 Celsius
Moist - 45% +-
7 Liter flowerpot (6 liter soil)

I am using Bio Grow from Biobizz, every 2-3 wattering.

I think the issue was that I never gave enough water... I never let it drain from the button... beginner mistake.
My flowerpot has +- 6 liter of soil, and I gave only 1.5 liter every day...and fertilizer every second or third watering.
So I think the salts are not washed as it should? not sure...

Two days ago after reading a lot I did a water wash to remove salts from the ground, but I think the new leaves are still getting burned.

Can someone help to identified the problem?
Should I add fertilizer to the water? Avoid it for a while?
Is the reverse osmosis is good or bad for the plant?
To do another wash?


Thanks!
 

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piratebug

Well-Known Member
I don't see any burning, but I do see a calcium and magnesium problem. I will tell you this, most cannabis plants don't mind not getting the amount of magnesium that they really need, but then their other strains that will literally tell you, either you give me the magnesium I need or I will start stressing out, OG(s) are like that, but really anything with any Afghani lineage in it needs more magnesium than what you might ever believe! Anyhow... to keep the problem from getting worse spray her down with 1/4 tsp epsom salt mixed with r/o or distilled water and 2ml of camg, i use go camg+, then make sure you add 1/4 tsp of epsom salt to your watering / feeding along with 2ml camg to each gallon of water. But in your case where it looks like your plant needs both more ca/mg, I would use 4ml instead of 2ml for my go camg+ supplement!
 
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testology1980

Well-Known Member
Well, I watered this morning with bio grow, I will go to the hydro shop tomorrow to buy camg.
I came back home now and things are worse... :cry::cry::cry:

Can it be that the pot is too small? its 7 liter.
03.jpg 05.jpg 08.jpg 02.jpg
 
Nutty sKunK

Nutty sKunK

Well-Known Member
testology1980 said:
Thank you,
are you sure? I am getting crazy.. all the symptoms look similar...I cant tell what is it

I found a similar image in one of the posts (i can't enter a link here cause I am new) but here is the image from the link:
excess-or-lack-of-potassium-in-marijuana

View attachment 4384930
Click to expand...

The dead spots are calcium.

Regarding the purpling I see even your stems are purple? Genetics?

Cold nights?

If not then purpling usually means a lack of P.

Here is a handy chart.

https://images.app.goo.gl/jmjvXK13NC5dwa1x9
 
coreywebster

coreywebster

Well-Known Member
testology1980 said:
Yes, 200W

View attachment 4384968 View attachment 4384969
Click to expand...
Ah im glad its not what I thought it was.

Right 200w in such a small space is excessive, that light is fairly concentrated as far as diodes go.
I would back the light off to 2ft away from tops at least.

It does look like calcium , but I wouldn't be at all surprised if it were the light. I had the same thing happen when I first started using quantum boards which I set up too close. Massive dead patches that look like really advanced calcium def and other weird symptoms that could of been misinterpreted as various deficiencies.

I could be wrong, but it looks a lot like what I had happen. If you can raise your light or dim it considerably that would be my first option because you may end up chasing your tail for a long time if it is that.
Besides that if it is a genuine deficiency lowering the light intensity will slow it down while you get shit sorted out.
 
coreywebster

coreywebster

Well-Known Member
It would also explain the red/purple tinge to the leafs. The chloroplasts become oxidized and the green pigment reduces leaving the chromoplasts pigment more visible.
 
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testology1980

Well-Known Member
Thank you, I did that + cal mag spray and watering and cut some leaves. Looking better, I will update soon.
Its amazing how we can love a plant :)
 
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