Why my photoperiodic plant stopped growing ?

[richard1806]

I have a 7-week-old photoperiodic plant. Being my first growth run, it didn't grow much because I was afraid to give it too much fertilizer, and I didn't use special soil. I used flower soil with a pH of 6.5. I only installed a fan and reflective foil in the fourth week, but despite that, it was growing quite well until then. In the fourth week, I noticed a change in its appearance after I lowered the CFL light too close to it. It has been three weeks since then, during which I tried watering it less frequently, allowing the soil to dry out. Then I returned to a balanced watering schedule and attempted to spray water on the leaves. The LEDs are positioned 25 inches away from the plant, and the temperature is 80°F with 55% humidity.

Not only has it not recovered, but for the past three weeks, it has only produced a maximum set of leaves. The lower leaves do not have this issue and look fine. I understand that the plant may develop leaves like this to prevent water loss when it's hot, but even when the temperature was 73°F, the leaves remained the same.

Do you have any idea why it's not growing anymore?

This is her current pot:

Should I transplant it into this pot:

 

[ArtfulCodger]

The top fan leaves appear to be taco-ing and twisting. That says "too much light" to me.

 

[Oldchucky]

IMO you are probably better off in the AirPot or whatever they call them. Your soil looks pretty dry. But that is hard to tell from the picture.

 

[richard1806]

The top fan leaves appear to be taco-ing and twisting. That says "too much light" to me.

Before the growth stopped, I was using a 150W CFL light, but now I'm using a 45W full spectrum LED. Tomorrow, I will move them back to the CFL light.

IMO you are probably better off in the AirPot or whatever they call them.

The surface of the soil is quite dry, but due to its shape, I believe there is a significant amount of moisture accumulating at the bottom. It appears to be moist about 3 inches down. I will move it into an AirPot,I hope the roots won't come out through the holes or get damaged during the transplant.

Thank you for the advice.

 

[richard1806]

I moved the plant into an airpot and placed it in lower light conditions, and I haven't watered it for 3 days, or maybe even 4. I also lowered the temperature to 71°F, and the humidity is at 50%. Unfortunately, despite all this, the upper leaves still look the same. Would it be a good idea to do topping and remove the problematic leaves? During the transplanting, the tips of some roots got damaged, and I also noticed that the roots are quite thin.

 

[MEGA956]

Maybe the plant is just short, clone or seed?

 

[richard1806]

It is seed, indica dominant but it only have like 40cm

 

[Stokes]

If you want that plant to amount to anything you need atleast a 3 gallon pot. Id recommend 5 gallon or bigger.

 

[GNick55]

after transplanting you should water/saturated slowly and makesure the complete medium gets wet..
show a picture of the soil you transplanted into?
and of any/all nutrients you have there?

 

[richard1806]

If you want that plant to amount to anything you need atleast a 3 gallon pot. Id recommend 5 gallon or bigger.

The airpot is exactly 3 gallons.I didn't know that a 5-liter pot was needed; I'll remember for the future, maybe I'll move it when it gets bigger.

after transplanting you should water/saturated slowly and makesure the complete medium gets wet..
show a picture of the soil you transplanted into?
and of any/all nutrients you have there?

I didn't water it after transplantation; I wanted to let the soil dry out as much as possible, even though it wasn't very wet. However, during transplantation, I noticed very thin brown roots. Could they have been rotten or dead?

Just 12 hours ago, I barely watered the plant, and I noticed that a lot of water is coming out directly through the upper holes of the airpot. I'm not sure how I should water it since almost all the water drains out. I watered it very slowly, allowing the soil to absorb drop by drop.

As for fertilizer, I'm using Biobizz Grow with an NPK ratio of 4-3-6, adding 4ml per liter of water.

 

[cleanreid]

I’ve always watered in after transplanting anything I’ve never known any other way maybe weeds different?

 

[richard1806]

I’ve always watered in after transplanting anything I’ve never known any other way maybe weeds different?

I believe they are the same, but my knowledge about plants is close to zero. I will remember from now on.

 

[GoldenDragondnw]

It looks good to me. What week again?

 

[GoldenDragondnw]

It may just be the strain and short plant and you're trying to stretch it into something it's not. But idk I'm a novice.

 

[richard1806]

It may just be the strain and short plant and you're trying to stretch it into something it's not. But idk I'm a novice.

I am a novice too, and in my opinion, the plant is not happy. It's week 7, and it's very small because it's my first run, and I just wanted to grow them without doing any low-stress training or anything else. I used very little fertilizer, about 30% to 45% of what was needed, but I still don't know what it's lacking now.

 

[GoldenDragondnw]

I am a novice too, and in my opinion, the plant is not happy. It's week 7, and it's very small because it's my first run, and I just wanted to grow them without doing any low-stress training or anything else. I used very little fertilizer, about 30% to 45% of what was needed, but I still don't know what it's lacking now.

Time. Give it a little time. It'll grow bigger in a bigger pot.

 

[richard1806]

I will transplant it into another pot when it grows bigger, for now, it has enough space. You said it very well, to give it time, and that's what I will do, and I'm confident that it will be fine. I really appreciate how you suggested giving it time.

 

[richard1806]

Do you have any idea why some leaves look like that ?
What are those spots ?

 

[Eclipted]

Do you have any idea why some leaves look like that ?
What are those spots ?

View attachment 2009997

Are you doing any foliar sprays ?
Where is it on the plant?
All show up at once or gettin worse over time?

 

[richard1806]

I haven't sprayed anything on the leaves; the affected leaves are few and located at the bottom. They appeared very slowly, and it's not a major issue, but I want to understand why they appeared so I won't make the same mistake again.

Based on my research, it seems to be a magnesium deficiency, but I'm not sure if that's the exact cause.