7th week flo, leaves curling, yelow/brown spots

[mkz]

I have some issue with my plant.

A week ago (now maybe more) plant started to take less water
than it used to. Now leaves are curling, some faint yellow
colors and brown spots appeared.

Medium is soil with perlite, dolimite, using organic nutes
(6+5+10) and molasses every other watering.

Watering with tap water with few drops of vinegar to set ph 6.5 usually once per 3 days,
now 5th day since last watering and still heavy.

CFL light (total 10k lm for 2 plant box, now half empty), 12/12 (tuned out to be photo)
Temps 26C-30C, humidity 40-50%

I think in my pot I have some springtails - little insects that can be noticed in
runoff water. I sprayed soil with neem oil and it seems it helped a bit.
Maybe they just ate my roots?

Any advices?



m.

 

[namvet25]

You should be using cal/mag.

 

[mkz]

Some time ago it was watered with pinch of epsom salt added, but I guess then that was not enough.

 

[namvet25]

Your plants look ok but have a few rust spots witch means lack of calcium or magnesium.Always use cal/mag especially during flowering.

 

[mkz]

Added some more dolomite, and sprayed plant with epsom salt few days ago and once again yesterday - I think it already helped (no new spots,
although leaves stay curled). Will see in few days.

Thanks alot

 

[Builder0101]

"(6+5+10) and molasses every other watering"

As you enter flower this should be something like 282. Looks like some foxtailing going on.
I dont like to use cal mag last month of flower. Carcinogenic. If the plant quits drinking it is probably finishing. At this point a little cal deficiency is not going to hurt anything. IMO. Stop the nutes. Let her finish. It is what it is at this point. Only thing I would consider is a fulvic spray on leaves only not bud. Dont want to wet the buds. I would leave my tent open after to keep the humidity from spiking while the spray dries. My humble opinion. Time to clean the system and let nature take its course in an attempt to get the best smoke. GL.

 

[Waira]

Springtails are harmless, no worries there,...

Your nutes are out of balance, off ratio for bloom that is,... too much N, not enough P; you have P defc. for sure, looks like maybe micronutes are short too,.. What organics are you using? Are you checking in-pot pH?
.. .. the larger yellow/dead patches are P defc., plus the not so good bud: leaf ratio, which too much N and and lack of P will do,... No fixing it this late, but boost the P if you can to plump up a bit...
What type of CFL is this, dual spectrum I hope?

 

[Builder0101]

P is right. Thanks.

 

[mkz]

Thanks everyone - already chopped it, now just needs day or two more before curing. Not big yield, but still hapy it managed to the end.
I think it was too late trying to fix deficiencies - and in just few days trichomes turned clear to milky/amber.

Next grow is running with Mars Hydro TS600 - bit more light, bit cooler - hopefully it works even better.

thanks again