What causes this deficiency please

this girl is wilting pretty much all over…

Here’s a …picture of a marijuana clones I had a few years ago.


I was experimenting with growing an entire plant from clone to harvest in a solo cup, which is why you can see flowering plants in such small containers. Each of these were flowered as soon as the clones took root. This technique is often called “Flowering from seed” or “12-12 from seed” and just means that you force the plant to start flowering at a very young age. I wanted to see how small I could get flowering plants.

Each clone was give the exact same nutrients, conditions, etc. They were green and healthy when I left for a 3-day trip.

Situation: I was leaving for 3 days, and these flowering marijuana clones needed to be watered almost daily since their containers were so small.

In an attempt to give them enough water to last the trip, I over watered them before I left.

When I got back, the plants looked like they had practically died!

Look at how different all of the symptoms were with each of these plants, when the problem was actually the same for all of them:

Same Underlying Problem For Each of These Clones

Kept in a grow room that was way too hot (it got up over 100 degrees while I was out of town, and they were kept in these temps for 2-3 days)
Too small container for their roots (with bigger root mass, marijuana plants are much more resilient to problems)
(remember, these clones were ALL green and healthy before I left, so I feel certain these problems were all caused by the reasons stated above)

Resulting Symptoms Varied Greatly

Clone 1: leaves yellowing and curling up like elf feet, tip burn

Marijuana clone one - leaves turning up like elf shoes

Clone 2: curling, rusty brown edges and brown spots

rusty outer edges of the leaves and brown spots

rusty outer edges of the leaves and brown spots

Rusty brown spots appeared on this plant
color and curling upwards towards the top of the plant, and yet another type of rusty brown spots and yellowing / curling towards the bottom (looks like a nitrogen deficiency on bottom)

Yet another type of rusty brown spots appeared on this plant, with yellowing of the leaves and curling up

Marijuana clone 4 - Yet another type of rusty brown spots appeared on this plant, with yellowing of the leaves and curling up

Clone 5: brown spots on top, taco leaves, browning, curling of lower leaves, like a phosphorus deficiency (this is the only clone the appears to have what looked like a phosphorus deficieny in the lower leave

the brown spots on the lower leaves, they look like a phosphorus deficiency, yet this is the only clone showing this symptom

Rusty outer edges, brown spotting

Taco leaves, brown edges and brown spot

the brown spotting

the brown spotting on lower leaves

the brown spotting and yellowing on lower leaves

The truth is, when the marijuana plant’s roots are not happy, and when plants get too hot, they freak out!

Often the symptoms may vary quite a bit, even if you have the same underlying problem.

I fixed the problem (controlled heat, and proper watering practices). Symptoms stopped getting worse. Nearly all of them pulled through and made it to harvest.

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This happened in one day
Outdoors. there were four of 8 that this happened to literally in a day.
my guess is that I overmixed Tiger Bloom, applied two days before. the other four with the exact same treatment are fine.
I have no clue, hope someone can help here.

thanks for sharing that. These girls are now holding steady, but they had gotten pretty bad, and I have leaned a LOT during the process of trying to determine what I did wrong.

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I was just looking. For this.
I knw what your problem



Root Rot

Ph Problems

One of the first signs of having a slight ph problem is, your plant having part of the leaves kind of twisty, spotty with brown, yellowish, red spots within each other.
Sometimes they don’t have to have all the colors, they could just be spots that have yellowish brown, or just reddish brown and can happen anywhere on the plant. Mainly starts on big fan leaves then goes to little leaves.
When this happens you need to check your soil ph, water ph before and after adding your nutrients. One of the biggest causes is adding nutrients like earth juice; they take the ph down quite a bit. Also can happen when you add bone and blood meal to your soil, that will throw the ph off as well, so it’s smart to test the mix before putting your plants into the mix. After the spots happen you will soon see nutrients being locked out, when that happens DO NOT ADD ANYTHING TO FIX THE PROBLEM UNTILL YOU GET YOUR PH FIXED!! Reason why is, because the plant isn’t absorbing that nutrient, by adding the nutrient it is deficient in, you are causing it to have a build up in the soil therefore can cause that nutrient to become toxic to the plant, because of buildup, to much buildup of certain nutrients will lock out other nutrients. In order to fix the problem you will need to first fix the ph and then if the soil is deficient in nutrients you can add it to fix the problem. A digital PH tester is the best tester to use as they are the most accurate. If you can’t afford a digital ph meter, then your best bet is to get ph testing papers. DO NOT get soil testers, those are the cheapest junk I ever seen and do not give good readings, so you cant rely on one of those. There are a lot of good ph testers out there, one of them is hanna. That is the one I use and is the best money ever spent! Vast majority of problems with soil ph comes from the soil if it has additives like peat moss, which is HILGY acidic… and or the water you are using, as well as nutrient deficiencies from using the wrong ph for watering. You want to be careful when adjusting your ph, doing this over a week is the best idea, to fast will cause shock to the plant. If you can’t get a hold of a ph tester or ph test papers. If you have some dolomite lime, its always better to use it in soil rather than every time you water, imo and from others (Uncle Ben) That it really doesn’t stabilize as many people think it does, Soil pH and micronutrient availability are interrelated. Don’t Use to much lime to decrease the soil pH to a point where micronutrients can’t be unavailable to plants. The micronutrients affected by pH include iron, manganese, zinc and, not as often copper. The problems when you apply to much lime can make it harder to correct your ph than what you would have when you didn’t add as much lime. You can always add more lime, but if you add to much you can’t remove it if you put to much lime in the soil. With great soil moisture, lime will work immediately and pH will start to change over a few months. However, it can take up to a year for the real benefit of lime to work. As the soil pH rises, the time it takes for lime to react decreases due to lower levels of soil acids. If you need to change your ph when its to high, if you choose to use lime it will not help as much as you think in lowering your ph, it would need alot of lime to lower your ph to a point where it would cause a toxcicity to the plants so look else where to use something to lower your ph rather than using lime.

So here at the bottom is a list of some buffers that are good to go with when raising and lowering ph!

Here are some ph buffers when your ph is too high: Use these SOIL PH Adjustments to lower your ph: sawdust, composted leaves, wood chips, cottonseed meal, leaf mold and peat moss. Sawdust, composted leaves, woodchips and, lemon juice, PH DOWN.

Hydro PH Adjustments: PH Down (vinegar and lemon juices are good for soil, but not recommended for hydro use) Phosphoric acid during flowering and Nitric acid for vegtative growth.Thanks goes out to syko2 for that one! (Only quality PH buffers should be used to adjust ph and be sure the buffer and nutrient work’s well together.)

Here are some that will raise the ph: use these SOIL Adjustments when your ph is to low: PH UP, dolomite lime, hardwood ash, bone meal, crushed marble, or crushed oyster shells, potassium hydroxide

Hydro Adjustments: PH UP,lime,potassium hydroxide and potassium sillicate .(Only quality PH buffers should be used to adjust ph and be sure the buffer and nutrient work’s well together.)


@garrigan62 so how much did you harvest off the solo cups per plant? I was thinking of trying that

No one has replied on here in so long but this is what some of my leaves look like. I’ve been freaking out but after reading your replies I was thinking of how my dad could have overwatered my plants when looking after them. The pots were pretty heavy. I also could have messed up with a homemade fruit fertilizer. I also have a stem issue, mind taking a peak to see if it looks like what you went through?