First grow, slowly yellowing and dying leaves.

1. ppm in is 180ish
2. was using white vinegar to balance PH but very recently switched to PH down
3. PH of water is 6-6.7ish. Normally around 6.4-6.5. We have well water.
4. Recently started testing run off. PPM was around 400, and PH 6.4, but the try was rather dirty and not sure how I can trust the PPM when I see so much floating in the water afterwards. Watering day is tomorrow and I plan to test run off again.
5. clones were acquired from old friend of my wifes. 10 days ago I re-potted from 3gal to 5 gal fabric pots using fox farms ocean forest.
6. - Not sure what they were originally potted in, but he had recommend fox farms trio for nutes.
7. This is our 1.5 grow. We lost 2 of the four plants after extended and unexpected hospital stay for the birth of our son (Halloween). 2 of the four plants came back and we picked up a new round of clones around mid-nov.
8. Temp varies between 66-80. The tent is in the basement. I run a space heater about 8-16 hours a day. But temps are normally on the cooler side. around 70ish.
9. RH can be a struggle. 35-45 on average.
10. Successfully fought WPM. Airflow is important!
11. Have dealt with what I believe are spider mites. I can see the moving slightly on the underside of the leaf. Isolate your new clones!
12. - I sprayed azamax 3x every 3-4 days at the end of November-early December. I thought it worked, as I so no signs for weeks. but found a few more mites early this week on one plant. The one in the back left. the one with the slightly purple leaves. The coloring is normal for that plants genetics I am told. I will likely spray again in the next day or two.
13. We are using fox farms trio for nutes and have been loosely following the feedings schedule. Feeding them once a week.
14. Was watering about 1 liter 2x a week. But gradually of the last 3-4 weeks this has been increasing. To about 2 liters. I think I should probably increase even further. I am afraid run off is about not quite 10%

C20H25N3O said:

First timer here. I am getting ready to switch some clones into 12/12 and I have been dealing with slowly yellowing and dying leaves over the last few weeks. I really am out of ideas. I've looked at a lot of charts, images, and have read tons. I am unsure what I am dealing with.

Here is a short gallery where you can see the issues: (Ignore the first photo -- story below)

https://imgur.com/a/zZT6RLj

1. ppm in is 180ish
2. was using white vinegar to balance PH but very recently switched to PH down
3. PH of water is 6-6.7ish. Normally around 6.4-6.5. We have well water.
4. Recently started testing run off. PPM was around 400, and PH 6.4, but the try was rather dirty and not sure how I can trust the PPM when I see so much floating in the water afterwards. Watering day is tomorrow and I plan to test run off again.
5. clones were acquired from old friend of my wifes. 10 days ago I re-potted from 3gal to 5 gal fabric pots using fox farms ocean forest.
6. - Not sure what they were originally potted in, but he had recommend fox farms trio for nutes.
7. This is our 1.5 grow. We lost 2 of the four plants after extended and unexpected hospital stay for the birth of our son (Halloween). 2 of the four plants came back and we picked up a new round of clones around mid-nov.
8. Temp varies between 66-80. The tent is in the basement. I run a space heater about 8-16 hours a day. But temps are normally on the cooler side. around 70ish.
9. RH can be a struggle. 35-45 on average.
10. Successfully fought WPM. Airflow is important!
11. Have dealt with what I believe are spider mites. I can see the moving slightly on the underside of the leaf. Isolate your new clones!
12. - I sprayed azamax 3x every 3-4 days at the end of November-early December. I thought it worked, as I so no signs for weeks. but found a few more mites early this week on one plant. The one in the back left. the one with the slightly purple leaves. The coloring is normal for that plants genetics I am told. I will likely spray again in the next day or two.
13. We are using fox farms trio for nutes and have been loosely following the feedings schedule. Feeding them once a week.
14. Was watering about 1 liter 2x a week. But gradually of the last 3-4 weeks this has been increasing. To about 2 liters. I think I should probably increase even further. I am afraid run off is about not quite 10%

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TanzanianMagic said:

The state of the plants, the powdery mildew and the spider mites all point to your environment being too dry.

What you need is a watering blanket with a reservoir.

That way water is continuously moving up through the soil all the time. Which also keeps nutrients available to the plant. Also, a watering or pouring blanket eliminates overwatering as well as underwatering.

The plants look like they've missed a few waterings.

--

Cannabis is a riparian plant, which means it grows between the edge of the stream and the highest point of the floodplains. And in ditches, which is why they call it ditch weed.

Because it is an annual plant, and in the tropics there are three main seasons - cool and wet, hot and wet, and hot and dry - cannabis sees them all. However through flowering it needs lots of water moving up through the soil. When the flowers are well developed, they need less water, and a drop in pH to increase trace element takeup and reduce P and K takeup which should come from the nutrients in the leaves. The pH drop would normally come from the rain, which is acidic, and also flushes calcium.

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Creeperpark said:

Fox farms nutes will drop the pH of the water to 4.5 every time! Its made to use with their Ocean Forest and Happy Frog potting soil which has a 7 pH!!! When you put a 4.5 pH water with a 7.0 pH soil you get a 6.2 pH in the container! If you use Fox Farms fertilizer with another soil you are not using it correctly and will get burnt or yellowing leaves.

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troutman said:

C20H25N3O = LSD

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CannaRed said:

From B.O.G.?

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C20H25N3O said:

I've eliminated the WPM issue by purchasing a tent and adding proper exhaust. I do worry about RH otherwise.

Your other information is useful. However, the one plant in the front right seems to look droopy no matter how much water I give it. Which is of some concern.

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TanzanianMagic said:

What can happen with regular watering, is that - depending on the medium, especially peat - the medium isn't taking up enough water. Basically the water runs off the sides and the center of the rootball never gets saturated.

One way to water properly is to do so slowly. Water just enough to wet the top of the soil and no more. Wait 10 minutes and repeat for the rest of the hour. You'll be surprised how much water the medium can hold before there is runoff.

With a watering blanket, water is always moving up through the medium, and it does so evenly.

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Mattbho said:

If those are on a basement floor that could fuvk u right up check temp of the bottom of those pots . I see the buckets lids and the trays. I'm just wondering if that is enough insulation .

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Mattbho said:

Also if you need to run a heater those cheap box fan heaters kill the rh worse than hps . I tried keeping a saucer full of water in front of mine , but eventually gave up an bought one of them oil filled jobbies and used the airflow of the tent keep a constant.

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AgentPothead said:

Peat is amazing because once it dries out it's actually hydrophobic and repels waters pretty decently cause of all the tiny hairs. Once water gets trapped in the space between those hairs though, through evaporation or just physical force, ie spraying, it becomes hygroscopic and sucks water up really well. If you are having problems re-wetting peat, they recommend a surfactant which breaks the waters skin tension, something like agave or yucca extract are both organic and work great.

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