Off color and burn on leafs

Ok to start off this is my first soil grow. I have grow a dwc twice and thought maybe try soil. So here i am.
I am growing a grand daddy purple. I am using nutes i bought from ILGM. My lights are leds from fecida 2000 watt equivalent. I am using a growtent 3’x3’x7’. Cloth pot 5 gallon.
So the issue is the leave keep turning yellow and brittle. Here are some pics.





I did a soil test, look like Calcium deficit. So i added some cal/mag and it seemed to get worst. Am i over/under feeding her.


So if any one has any insite, i am eager to learn. I sure i am missing info you might need, i will try and answer, just remember i am very new and have lots to learn.

I typically water when the moisture is gone about an inch or so down in the soil. I will water about 1/2 to a whole gallon pending on moisture level. I keep the temperature at the peek of the day around 77° to 80° night time temps can dip down to 65° maybe from time to time 60°.

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Looks like normal end-of-grow fade.

Would still like to see your pH and PPM to verify not more significant issues.

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When feeding synthetic fertilizer you should feed the plant until 20% of what you’re putting in runs out the bottom (run off) you use the run off to test the PH and PPMs of the medium. I didn’t see what your input PH and PPMs are?? This a calcium deficiency and often accompanied by potassium. Most deficiencies are PH related…Need some run off numbers to assist Growmie :love_you_gesture:

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Welcome to the neighborhood. Are you checking your ph and ppm on your run off? That would help you know more about what the problem is. About your light the actual watts at the wall it says 260 watts. :v::blush:

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On the next watering (tomorrow mornin) i will check the ppm and ph. Thank you for the imput. Its a big help.

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Also this plant is schedule to harvest sept 26th. Popped out of the soil on june 20th. That is if i did my math right. About 2 weeks in seedling stage. 4 weeks veg. And 8 weeks of flowering. Is this correct for Autoflower?

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I would recommend not going off breeder harvest times. Start checking the trichomes around week 8, Growers choice on the ripeness but definitely wouldn’t harvest unless their 100% milky across the board. Most shoot for 90% milky and 10% amber. You’ll need a jewelers loop or mag scope to check these :love_you_gesture:

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Week 8 of the plant life or week 8 of flowering?

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Flower Growmie, most autos I grow are ready around week 10 :love_you_gesture:

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Ph is around 6.8 which to my understanding is ok. I can ph down the water if need be. Now the ppm are way to high i imagine, at 1800ish. Im guessing straight water for a few days?
Its only been flowering for about 5 weeks.




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1800 ppm not alarming for soil grow. A slurry test of fresh bag can easily be 3000-4000 ppm.

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