Deficiency or imbalance? Detailed info inside...

[Charoite]

If the problems started in the first week, maybe it was the seed starter. Have you tested the ph of the seed started and the main soil on their own, (they don’t state a ph for it like they do their soil/s)? I personally have never had success starting in a small amount of a seed starter, then moving into a main soil. One thing for me was the seed starter stayed really wet, while the outer soil dried faster. From my experience, 2 different mediums don’t even out the moisture between one another very well, though it looks like it works well for some people.

Since I have been starting all my plants in solo cup sized containers for the first week I have been nearly 100% good starts. I know, it seems like that is frowned upon for autos, but it seems fine to me.

I don’t know what bti or that soil drench is, but if used before any problems, maybe the cause.

ive had nats in the past, and some recently, even on some very tiny seedlings of different plant varieties. From what I can tell, they bother me much more than the plants. I cover all access points to the soil now with plastic I would otherwise put in the recycling and it seems to be working great.

I didn't really think of possible issues with the seed starter, but I still have the bag so I'll run a pH test later.

That said, it was about a solo cup sized portion in the middle of the pot where the seed was planted, same as the other 2 plants in the tent which are not having the same problem.

BTI is a bacteria that kills certain pest larvae and is effective against fungus gnats. It's found in mosquito dunks/bits or gnatrol. Dr. Zymes was the other product used. The combination effectively ended the gnat population, and the other plants were not effected

I'd be willing to bet you've got a calcium excess that is causing a lockout. @Mañ'O'Green has a great write up about this!

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

@Suki813, good information in that post. Not sure if a Ca or K abundance could be the problem. What do you suggest I could do if anything?

 

[Peacefulgarden]

I didn't really think of possible issues with the seed starter, but I still have the bag so I'll run a pH test later.

always make sure pH is good before starting plants. ~6.0pH Without that your plants will not grow well or at all if to far off

 

[Badfinger]

I was wondering if you used mosquito bits as your BTI treatment? My plants have gotten worse, ALOT worse, And what I discovered today is my remaining unused water that was BT treated would drop to a ph of 4 over the couple days between waterings. Thinking my ph was ok, I used that remaining water more then a few times.

 

[Peacefulgarden]

I was wondering if you used mosquito bits as your BTI treatment? My plants have gotten worse, ALOT worse, And what I discovered today is my remaining unused water that was BT treated would drop to a ph of 4 over the couple days between waterings. Thinking my ph was ok, I used that remaining water more then a few times.

Op needs to lower pH anyways, so that would be a good thing for them.

 

[Mañ'O'Green]

@Charoite Welcome to AFN This looks like a case of giving your plants too much Love. The real kicker is the two foliar applications of Mg. The Stonington soil would have all of the calcium and magnesium for the entire grow and then some. Try Just low <80 PPM water PHed to 6.4 for a week. Less is more! Don't worry about run-off testing the information is unreliable. If you really need to know the PH of your soil in the root zone get an Accurate 8 soil probe or the clone of it. Don't buy a cheap one they do not work and are just a waste of money. I use Blue Lab but they are expensive.

This is the clone.

 

[Charoite]

I was wondering if you used mosquito bits as your BTI treatment? My plants have gotten worse, ALOT worse, And what I discovered today is my remaining unused water that was BT treated would drop to a ph of 4 over the couple days between waterings. Thinking my ph was ok, I used that remaining water more then a few times.

@Badfinger, yes it was mosquito bits used for the BTI treatment. All 3 plants received the same doses. Still only the one is suffering.

Op needs to lower pH anyways, so that would be a good thing for them.

@Peacefulgarden, The soil slurry tests were 6.4-6.8. I thought that this was in range for an organic soil grow. What range do you recommend?

@Charoite Welcome to AFN This looks like a case of giving your plants too much Love. The real kicker is the two foliar applications of Mg. The Stonington soil would have all of the calcium and magnesium for the entire grow and then some. Try Just low <80 PPM water PHed to 6.4 for a week. Less is more! Don't worry about run-off testing the information is unreliable. If you really need to know the PH of your soil in the root zone get an Accurate 8 soil probe or the clone of it. Don't buy a cheap one they do not work and are just a waste of money. I use Blue Lab but they are expensive.

This is the clone.

View attachment 1396577

@Mañ'O'Green, Thank you! I believed that CoM should have been sufficient, but the one plant was suffering from week 1 with what appeared to be magnesium def. What's odd is the 2 sister plants have been thriving in the same mix. 2 bags were opened, bit unfortunately I did not label which plants received soil from which bag. I don't think pH was the problem because slurry tests showed them in range (6.4-6.8). I'm almost inclined to think one of the soil bags had excess phosphorus or potassium (or both), antagonizing uptake of other nutrients, as just 1 plant is struggling. Here is how they look now:

 

[Peacefulgarden]

@Badfinger, yes it was mosquito bits used for the BTI treatment. All 3 plants received the same doses. Still only the one is suffering.



@Peacefulgarden, The soil slurry tests were 6.4-6.8. I thought that this was in range for an organic soil grow. What range do you recommend?




@Mañ'O'Green, Thank you! I believed that CoM should have been sufficient, but the one plant was suffering from week 1 with what appeared to be magnesium def. What's odd is the 2 sister plants have been thriving in the same mix. 2 bags were opened, bit unfortunately I did not label which plants received soil from which bag. I don't think pH was the problem because slurry tests showed them in range (6.4-6.8). I'm almost inclined to think one of the soil bags had excess phosphorus or potassium (or both), antagonizing uptake of other nutrients, as just 1 plant is struggling. Here is how they look now:

I am going for 5.7-6.1, I don't think cannabis knows what medium it is growing in and it is know to like slightly acidic soil, slightly acidic = 5.5-6.5 neutral = 6.5-7.5.

That's just what I am trying to make my soil. I don't think I'm allowed to talk in help threads anymore.

 

[Suki]

@Badfinger, yes it was mosquito bits used for the BTI treatment. All 3 plants received the same doses. Still only the one is suffering.



@Peacefulgarden, The soil slurry tests were 6.4-6.8. I thought that this was in range for an organic soil grow. What range do you recommend?




@Mañ'O'Green, Thank you! I believed that CoM should have been sufficient, but the one plant was suffering from week 1 with what appeared to be magnesium def. What's odd is the 2 sister plants have been thriving in the same mix. 2 bags were opened, bit unfortunately I did not label which plants received soil from which bag. I don't think pH was the problem because slurry tests showed them in range (6.4-6.8). I'm almost inclined to think one of the soil bags had excess phosphorus or potassium (or both), antagonizing uptake of other nutrients, as just 1 plant is struggling. Here is how they look now:

Your soil ph is just fine.

 

[Suki]

You may have discrepancies between your bags of soil, but its also important to remember that different strains, and even different plants within a strain are going to have different optimal levels of nutrition.

 

[Charoite]

You may have discrepancies between your bags of soil, but its also important to remember that different strains, and even different plants within a strain are going to have different optimal levels of nutrition.

@Suki813, definitely a possibility. Maybe forum stomper just doesn't like Stonington early on. If I run it again, I'll try a lighter mix in the top half of the pot