Yellow spots PLEASE HELP

[Funky Trichomes]

Problem: yellow spots on fan leaves
-Medium/grow method: Bio Bizz light mix 65%, coco 35%.
-Feed and supplements used: Bio Bizz grow, top max & shogun cal mag all .5 a liter, all fed a liter with 10 percent run of.
-Water source: 6.2 dechlorinated
-Strain: Blue Treacle, 16 days.
-Climate: day & night is 30-31.8 the last day normally 28, lights of goes down to 22-23. Humidity is 64 throughout.
- Light used: Hps 400w setting 28 inches from plants.
-Additional info: Occured over night came in this morning and the leaves had yellow spots all over, happened just after feeding them. The tent has got hot the last day & it's got more humid in there but I got the humidity controlled anyways. Going to get another oscillating fan tonight.

 

[hecno]

Ok , you have to take photos in natural light , or at least white light . Hard to see what the problem is .

 

[Funky Trichomes]

Ok , you have to take photos in natural light , or at least white light . Hard to see what the problem is .

Changed the photos hopefully they are better!

 

[Funky Trichomes]

The tips of the leaves are also getting dry and going crispy and one of them is brown and completly fucked

 

[hecno]

Mate , I am unable to help you due to the coco % I have never used it . So I don't know how it would react with the soil You do have a deficiency .Go back to where you posted in the Coco coir thread and post there , you will get the help you need .

 

[Funky Trichomes]

Doesn't matter now their totally fucked

 

[GeorgeCloney]

FWIW,
What caused the sudden rise in temp?
Have you been measuring your EC and runoff PH lately?
The plant may be in the process of starting a phosphorus deficiency.(pending your feeds ec).
You mentioned .5 calmag in 1 liter...as in .5ml/L?
Surplus calcium will also lockout the phosphorus.


In doing a little research, I learnt that your plant has a SWEET TOOTH background in its strain.
I grow pure Ruderalis ( the grand daddy of all Autos).
All autos which I've grown so far completly dislike high temps (if they're background includes an indica mix).
The quicker the grow (harvest), the higher the Ruderalis content

Both Ruderalis and indicas are very cold tolerant, but dislike high temps.
Unlike sativas.
The temp swing from 30+ to 20 degrees is something to address as well.

I would attribute the issue to the sudden change in tent temperature, as you claim to be consistent in your growing method.

I don't think your plant is fucked (not yet anyways).
Try to stabilize the enviroment without stressing the plant any more if possible.

Its weed and will bounce back, but expect the harvest to be reduced, thats all.

cheers,

 

[Funky Trichomes]

FWIW,
What caused the sudden rise in temp?
Have you been measuring your EC and runoff PH lately?
The plant may be in the process of starting a phosphorus deficiency.(pending your feeds ec).
You mentioned .5 calmag in 1 liter...as in .5ml/L?
Surplus calcium will also lockout the phosphorus.


In doing a little research, I learnt that your plant has a SWEET TOOTH background in its strain.
I grow pure Ruderalis ( the grand daddy of all Autos).
All autos which I've grown so far completly dislike high temps (if they're background includes an indica mix).
The quicker the grow (harvest), the higher the Ruderalis content

Both Ruderalis and indicas are very cold tolerant, but dislike high temps.
Unlike sativas.
The temp swing from 30+ to 20 degrees is something to address as well.

I would attribute the issue to the sudden change in tent temperature, as you claim to be consistent in your growing method.

I don't think your plant is fucked (not yet anyways).
Try to stabilize the enviroment without stressing the plant any more if possible.

Its weed and will bounce back, but expect the harvest to be reduced, thats all.

cheers,

Hi mate thanks for the help, I gave them a look this morning and their even more fucked. I have no idea what happened they were fine a couple days ago then over night they all went to shit. The curling of the tips & spots I believe was down to nutrient burn it happened a week ago as well and I fed with plain water after and the plant was doing fine and the spread of yellow spots stopped and curling stopped. Thought they were two seperate issues but both must mean a nute burn. It then happened again with the next nute feed but even worse I gave a 14 day old plant the same feeding a 3 week auto would get and we'll the rest is history.

 

[Gwrgenau]

Hi

Got what looks like pretty much the same as you on the leaves.. but mine are a couple weeks from being done. Same tho.. two days ago everything looked fine then the past two days its went to not good. I am going to go to feeding without the Cal-Mag and see if that will let it finish.. not giving up yet. Good Luck.

 

[GeorgeCloney]

Did you measure your runoff ph and ppm(ec)?