Cannabanana said:

Hey guys,

I've been having the same deficiency for about 3 weeks now and after spending countless hours and days looking for a solution, I'm at a dead end and need some help.

Some information regarding my indoor grow:

Veg stage | 4 weeks

Medium: Coco perlite 70/30 mix in 3.45-gallon pots

Strain: OG Skywalker

Lights: Gavita 1700e LEDs running at 60%, about 2-2.5 feet above plants.

Room variables: Sealed indoor room| humidity 55-65% | Temp of room 77-79F | CO2 is at 800-1200 PPM

Watering details: Using tap water that has a base PPM of 250-280 | Temp 70F | pH 5.8-6.0 | current PPM @ watering 900-950PPM (post nutrient addition)

Feeding Schedule: The last flush was about 2 weeks ago. I used to water about every three days (up until 3-week mark) when I notice the pot gets lighter and the medium begins to become less saturated with water (I never wait until the medium completely dries out). I used to water each pot for about 15 seconds and would get runoff during every watering session. However, I realized that I might have been getting too much runoff so I shifted my watering schedule to every 2 days and now I only water for about 10 seconds. With 10 seconds, I haven't really been getting runoff. Is runoff during every watering session necessary?


Nutrient details:

1. Pro-Silicate 3ml/gallon (added 1 hour before any other nutrient and allow to mix)
2. CalMag 3-5ml/gallon (added second, etc.)
3. Root XL 1ml/gallon
4. Growth Enhancer 1ml/gallon
5. Mammoth .6ml/gallon
6. Veg A/B -> I've been using this to adjust PPM. Total added of each is about 25-30ml for the whole tank (30ml).
7. pH down

The above is my usual nutrient volumes that are used. However, recently I bumped up CalMag to 4-5ml/gallon since I've had a couple of recommendations stating that I had a CalMag deficiency. I know its too soon to see the difference, however, the plants don't seem to be doing any better.

The beginning of this week I topped/FIMMED all my plants. I topped half and FIMMED the other half (experimental purposes) and following that, I noticed the plants began to show a purple hue. I'm not sure if this is due to stress.

Every single one of my plants is showing some form of deficiency, some times even more than one. I've attached pictures below showing the different types of deficiencies I'm having. The purple/brown hue/shade on the plants started appearing after topping/FIMMING.

Any help would be appreciated as I am completely lost. Let me know if any more information is needed.

Thanks in advance!

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Aqua Man said:

What size pots. Coco should never dry and should stay over 90% saturated. You can treat it like soil. Also make sure you are getting a decent amount of run off. Also can you measure the ppm and pH of the runoff

After adding the silica ph down to 6.2-6.4 silica will raise the ph a lot and that can cause precipitate.

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Mr.Juice said:

I’ve never grown in coco before, so take my opinion with a grain of salt, but my first reaction was like holy crap you are hitting them with a ton of shit. 7 different chemicals all mixed together and who knows what kind of interaction is going on there. I don’t know what is in most of that stuff but you can safely say most of those things aren’t doing anything for you at the moment, eliminate them.

Flush all that stuff out, give it a basic nutrient, and nothing else, give them a chance to bounce back. Keep an eye on new growth and see what it does. I’ve found that CalMag creates nothing but problems, and will avoid it at all costs. An excess of one nutrient can cause havoc on the uptake of others, with so much going on in your nutrient mix it’s impossible to pinpoint if that is the problem.

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Beachwalker said:

I don't mean this in a bad way but everything you're doing is wrong; you obviously haven't read up much if at all on how to grow cannabis in Coco

so my suggestion would be spend a couple hours asap and read everything you can online

Read here and ilgm, royal Queen seeds & growweedeasy are a few other places to start and then you will have better questions to ask us, and our answers will make more sense to you

Tag me back in if you wish after you've read up on growing cannabis in Coco and I'll help if I can, good luck

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cemchris said:

Are you saying your base water is 250 ppm out of the tap? Have a water report?

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Beachwalker said:

Here's your problem right here you're not watering Coco properly..

View attachment 1016319

that's why I gave you all those websites to read because even though you claim you've read all of them..

..seems somehow you've missed a most fundamental fact that you water Coco at least one a day?!

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Cannabanana said:

Thanks for the links! I actually went through reading them this morning oncemore and saw the emphasis on watering Coco at least once a day, so I appreciate that. I've just been getting so many different opinions regarding watering frequency, I wasn't sure which was accurate. From the reading it seems like I need to water more frequently and allow for 10-20% runoff every single time.

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MIMedGrower said:

I think that the op pics look like burn amd lockout from too high input ppm’s. I would think half as much would be proper for those plants.

Or ditch the additives and feed only the base nutes at least till corrected. Needs a flush and feed back a light dose of base nutes in my opinion.

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GNick55 said:

first grow?

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Cannabanana said:

Yes, first grow!

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