Help with leaf discoloration

I looked at the chart that’s floating around but still can not identify the issue with this plant.




I’m in the 7the week of flowering in soil.
Ph is around 6. I’m using fox farm nuts. Temp @72F humidity @ 50%… I added calmag about 10 days ago for the first time on all 10 plants. I flushed at the beginning of flowering. I did notice browning tips after the flush but that’s it. Just 1 plant has this issue. Any and all help would be appreciated.

9/10 times you see random brown spotting towards the top of your plant tells you she is hungry for more calcium. I would just add a little bit more into the mix. Before you do that just make sure the ph runoff is within range. If the ph is off, then she just cant get to the calcium. You never want your soil runoff lower then 6.3ph

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Plus 1 on this. I would also add light. A few grows ago i got a crazy deficiency like this and it didnt look like anything id seen. Turns out my ph runoff was a little low and i was blasting with waaaay too much light. Its worth stating i was in veg tho. Sometimes light amplifies issues, too high or too low doesnt matter. Now, im a novice grower so wait til some of these experts give you some input before reacting buuut… get ph, calcium rite and make sure your not putting mor than about 10k on canopy where you see the issue. Also, are you running any co2, that matters when it comes to light.

Thanks @Silverback @imSICKkid. I’mrunning 2x3000 King LEDS about 30 inches from the canopy. I’ll check the run off Ph. Not using any co2.
I’m looking at this grow chart that came with fox farm nuts. It only shows 12 weeks total from germination. I was in veg for 6 weeks. That leaves 6 weeks for flower according to the chart. It does say to continue week 12 if going beyond. Then I read somewhere to stop nuts around 2 weeks before harvesting.
Question is, should I keep doing the 12th week like the chart says or just plain water, maybe tap to give back the calcium. Been using distilled water.



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I believe the king 3000 led pulls 615 watts at the wall, 1230watts of that light are good for flowering 24-25 sq feet. I dont think you’re over lit.
Using distilled/ro water will typically manifest calcium or magnesium deficiencies. Time to add cal-mag.

Looks like you have about 4 weeks left of flowering.
Leaves are shiny and dark green, so you could cut back a little on the N for the next 2 weeks. This is when you want to boost the flowering nutes.

pH 6 is too low for that soil. You ideally want 6.5, but 6.2-6.8 is manageable

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Thanks for all the help on this. I let you know in a week or 2 how this turns out.
Off subject, I have 3 auto’s, CBD Crack. Do you harvest also by time or do you wait until the signs are right?

Those got a looo[ng way to go brother. I nute till at least week 9, sometimes to 12. The key is those trichomes, got to watch them like a hawk. I check mine every day after week 9. When i see my first ambers i cut off nute and start flawlwss finish flush. Usually 2 weeks but it has gone longer and shorter.

Fwiw, it changes every tiime i grow. Thats why i watch trichomes so close. I also down gro room tent temp below 70 during flush, spike my stems and bombard with uv for the last 2 days. Then 48 hrs of dark before harvest.

Not sure any of it makes a difference but my shit is the fire! Yeilds are max for my lights and every one of my heavy smoking buddys hang around at harvest time like they got a kid being born. Course around here bag seed grown outdoor is all they ever get otger than mine. Im getting me a hash setup with my trump check… shoyld be a baller ass summer. Oh… and i use seedsman and ilgm seeds exclusively. With the iccasional rqs mixed in.

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Agree with all of this as well

I wait for the signs. The schedule is just a reference.

I got all my seeds from seedsman. I thought I still had a ways to go yet. Thanks for all your help and information.
I did get 1 male which I saved a lot of pollen from and pollinated 1 of the white willows. With this being the 1 grow, thought I would experiment a little. Dangerous but everyone looks good.

I grow only fems and just clone. Good seeds can be pricey but for me its worth it not to have to sex plants, or to pick seeds out. i might try it some day but i only grow fir personal consumption so 2 grows a year gives me waaay more than i can smoke, even if i just grow 4 at a time.

@Silverback what do you mean by “spike your stems”?

I just flushed this plant about 3 days ago. I still do not know what the cause is. The run-off ph was 5.3. The ph going in is around 6.









Stay safe

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@LoCoRock @CoyoteCody @MrPeat @Big123 @AAA Do any of you have any idea what is happening to this White Widow? I just gave cal/mag yesterday and today. Waiting on results. I have the chart that shows deficiencies but the coloring does it no justice. Any help would be appreciated.

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Epsom salt, 1 teaspoon per gallon, have you given any yet?

Do they have some fertilizer burn on the tips? Or did they experience other stress?

Are you watering with ph adjusted water?

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@Big123 I haven’t tried the salt. The brown tips showed up after I flushed them about 5 weeks ago. I am adjusting the ph to 6.5 to 7 when adding water. I’ve been using distilled water the whole time.

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I don’t think salt was the problem, another plant started turning yellow. I flushed all of them yesterday. Guess I’ll figure this out. Will post fix if I find it. Thanks

When you flush you should be washing out all the bad stuff in the soil, unfortunately it takes the good stuff too. It looks like a calcium or mag issue to me. Adding calmag will benifit new growth and get the plant healthy again. However. 7 is high for ph imo. Check soil PH and see if your where you need to be. Though this looks like calmag deficiency it could be nute lockout too.

It may take days if not a week or two to recover. Look closely at new growth as it comes in and adjust based on what you see. Careful not to treat old symptoms, that brown you got now aint goin anywhere, its permanent damage. As the plant recovers cut them off. I wouldnt stress them yet tho.

Im taggin a couple guys that have helped me out,
@Drinkslinger @Hellraiser. Make sure i aint steering this hombre wrong plz.

Not sure what the cause was. It was harvest time around week 11 so never got it figured out. The harvest was fire though, only thing that really counts. Started new grow about 4 weeks ago, hopefully no serious issues with this one. Thanks for all the help.

get some recharge and your plant will come back.

This looks like something I would rather use then Fox Farm. I just ordered a bag. We’ll try it on the new grow. Thanks for the info @BRFarming420

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