Deficiency, light burn, pH issue?




I’m concerned about my plants.
I’m thinking a pH issue.

Watering every few days with pHd water at roughly 6.5. Runoff pH is 5.4-5.5.

I’ve fed tiger bloom once two days ago at 1/4 strength. Only other nutrients is calmag a few times throughout vegetative cycle.

At one point the plants we re fairly close to the lights (they grew quickly) I’d say 12-16 inches away. I raised the light since. That’s also when I noticed burnt leaves at the tips and what resembled a calmag deficiency.

I tried watering with a pH of 7 last week and runoff is still low.

I feel like they’re wanting nutrients but I feel like the pH needs to increase. Should I still feed with tiger bloom at 1/4 strength with high pH water?

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How old are the plants?

What kind of soil are you in?

What’s the total ppms of your feed when you feed them?

What are the ppms of your runoff after feeding them?

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Got a picture of under-leaf spots?
Dark spots in concentric yellow rings are infection.

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  1. Indoor or outdoor? - size of grow? Indoor
    9 autos

  2. Otigin of seeds? Fat banana, northern lights, and white widow CBD

  3. Regular, feminized, or autoflower? Autoflower

  4. Origin of water. PH, EC/TDS of source water? Filtered sink water, pHd 6.2-6.6, ppm of 150ish

  5. PH and TDS/EC of if mixed solution?
    PH is 6.5ish

  6. Grow method? Soil, Soil-less, Coco, Hydro, Aquaponics. Please explain.
    Happy frog with perlite 3-1 ratio

  7. Nutrients or fertilizer system used.
    Fox farm trio- haven’t used any yet
    Cal mag- 2-0-0
    Tiger bloom 1/4 strength

  8. What typr of lighting are you using? LED, HID (MH, CMH, HPS), or Fluorescents? Please elaborate.
    LED lights

  9. What are the temps in your growspce? Day / Night?
    73-77 degrees F

  10. What is the RH = relative humidity in your growspace? Day / Night?
    RH around 60-65

  11. Do you have a Ventilation system? Size? 4", 6"?
    Ventilation system but not using, even on low it lowers the RH quickly

  12. Co2
    No

  13. How long have you been growing?
    3rd grow over two years

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Plants sprouted February 10th.

Ppm for feeding is roughly 250 with tiger bloom 1/4 strength

Runoff ppm is around 1200.

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Yeah bacterial infection. All plants? All limbs?
I didnt have it, I wouldnt know how to rid. So I’d try affected-limb removal. A few minutes read would confirm and find out if you can save

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*except my tomatoes, I was able to get half a plant to finish

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Phosphorus deficiency and probably calcium as well. This is most likely PH related and I would recommend a reset flush seeing as the PH is 5.4 :love_you_gesture:

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@Zackmk345
I concur with @OGIncognito your soil needs reset. Your plant is not getting the proper nutrients due to your pH issue.

You’re soil has 1200 PPM at this point with a crazy low ph.

This is what I would do. It looks like you have somewhere between three and five gallon pots.

1.) I would mix up a 1-1/2 gallon of nutrients only (no additives) to 600 ppms and pH to 6.5

2.) Your tap water is 150ppm (use that) get a 5 gallon bucket fill it with your tap water let the water sit for a little over 24 hours to allow it to gas off the no-no’s in tapwater

3.) Once your water has gassed off for 24 hours slowly add Cal mag until you reach 450 ppms total

4.) pH that 5 gallon bucket to 6.5 pH this is going to give you a little over 500 to 600 PPM.

5.) Slowly run this water through your plant. Once you get down to the last gallon of water in your 5 gallon bucket make sure your drain pan is empty and run the last gallon through.

6.) Now check your pH of that last gallon of runoff. If the pH is 6.5 you have completed the flush if your ph it’s still low (repeat above)

7.) If your ph is 6.5 take that 1-1/2 gallon of nutrients that you sat aside make sure the pH is still 6.5 and run it through your plant. Check your ppms of the runoff along with the pH. And you should be good to go and return to your normal feeding schedule.

Good luck

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This is what I think too

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So 6 gallons of water total per plant?
5 gallons of flush and 1 of nutes?

That seems like so much work lol. (Not doubting the method)
That’d be 54 gallons total.

Would fox farms sledgehammer help decrease amount of water needed for flush?

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I feel your pain brother I’ve been there I had to flush an entire 4x4 tent due to the infamous Happy frog soil ph swing.

I base 5 gallons of flush and one gallon of feed as that’s what it took me to properly get my pH

The directions I gave you was exactly what I did and it fixed the problem I’ve harvested 90% of the tent to perfection the soil never gave me another problem.

I wouldn’t use sledgehammer on this. Use it on your regular flushes that are routine. (That’s just my opinion)

I just fed my plant 7 minutes ago here’s my runoff

It was a hell of a lot of work. I just had your exact same problem on this current grow. I did the above it fixed the problem to 100% perfection. That’s all I can offer you my friend. Proven results.

If somebody can chime in with a better idea that you feel more comfortable with. So be it.

Welp. I guess it’s time to invest in some more buckets lol.

What are your thoughts on dolomite lime?

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You remind me so much of me it’s scary. These are the same questions that I asked. Here’s my thought on the lime. You’ve got a serious problem right now. You’re locked out more than likely on nutrients that you’re using due to your extremely low Ph.

You can order the lime or go by the lime. Your plants are already sick you got a 60% chance the lime will not work. Not to mention, you will not know if the lime worked for at least 2 weeks (do the math).

Brother I so feel your pain and I’ve been exactly where you’re at I actually ordered the lime off Amazon when I was in your exact same position.

Ask @OGIncognito he was right there with me the whole way.

The most important thing here is fixing the girls however, you feel more comfortable trying lime by all means do what makes you feel comfortable so you can sleep at night. I truly wish you the best of luck.

Glad to know I’m not the only one in this struggle.
I’m going to do the flush!
The lime seems hit or miss for many.

Your method makes sense and it works for you so I’ll grab some more buckets, fill em up, and wait 24 hours :+1:t4:

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There’s way more out there than you think that went through this. For some reason we all tried to find any other reason than to flush.

Unless somebody has a better solution flushing is the proven fix.

Look at it like this you got 24 hours to let your water gas off. Within 24 hours if somebody has a better solution that you feel more comfortable with you’ve got time.

Also, I had additional soil from the problem batch. I did not disregard the soil in the bag. I simply flushed it prior to using it.

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Thank you so much for taking the time to help.
I’ve carved out some time to flush tomorrow.

Just curious, what soil do you grow in now? Sounds like you are not keen on happy frog.
(I’m not to happy with it myself now)

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Good. Just be sure when you make your feed batch of water you do this following the recommendation feed of your feeding schedule chart without any additional additives except the ph up or down whichever is applicable to assure that you’re at 6.5

As far as do I still use Happy frog soil yes however I don’t use the pre-charge in the soil I flush it all out first and I start from scratch with uncharged Happy frog.

I know you ask why in the hell would you do that.

The answer is simple Yes Happy frog had some bad batches they’ll even tell you however it’s still great soil.

I don’t have time to go through what I went through and what you’re going through now I eliminate that by flushing the soil down to zero ppms and 6.5 Ph then I take control of the grow at the very beginning.

Now you ask, why don’t I just buy a different soil. the answer is Happy frog is so cheap here I can get a bag for $23 and I’m talking the big bag so it’s worth it to me

My plants thrive and Happy frog soil. I feel better when I’m in control of what they get to eat from the very beginning. Long short, it’s a win-win with Happy frog