Please help me kill my plants less.

[Dagmonkey]

Wow. This is terrible. I wrote a really long post and it seems to have disappeared. The long and short of it is that my plants are dying.

The Basics:

First grow
Week 4 flower
Soil: Happy Frog
Amendments: dolomite lime, last week week.
Nutes: 10 ml Iguana Juice Bloom + 1 tsp Calimagic per gallon H2O
pH: About 6.2 to 6.4

Anyway, last week I got advice on a calcium deficiency. Have been treating. But my plants are still looking unhealthy. I am at a loss as to what I am doing wrong. There are healthy parts and dying parts on each plant. I am growing them under T5HO, but my cabinet is overheating so I have to leave the door open with a fan on. Trying to correct it but I think I have created light leaks, and I am too sick and tired of dealing with problems to fix it. Guess I will have seeds, too.

 

[Enigmatic Ways]

Wow. This is terrible. I wrote a really long post and it seems to have disappeared. The long and short of it is that my plants are dying.

The Basics:

First grow
Week 4 flower
Soil: Happy Frog
Amendments: dolomite lime, last week week.
Nutes: 10 ml Iguana Juice Bloom + 1 tsp Calimagic per gallon H2O
pH: About 6.2 to 6.4

Anyway, last week I got advice on a calcium deficiency. Have been treating. But my plants are still looking unhealthy. I am at a loss as to what I am doing wrong. There are healthy parts and dying parts on each plant. I am growing them under T5HO, but my cabinet is overheating so I have to leave the door open with a fan on. Trying to correct it but I think I have created light leaks, and I am too sick and tired of dealing with problems to fix it. Guess I will have seeds, too.


View attachment 3659627 View attachment 3659635 View attachment 3659631

What's your ppm?

 

[$bkbbudz$]

FFHF is a wonderful medium (I am biased though, I have used it for years). However, most FF soil and nute users will say that their products lack adequate amounts of secondary nutrients...Cal/Mag.

But as this plant is in flowering and needs more P...it may be deficiency there as well.

Take a look here:

http://www.growweedeasy.com/calcium-deficiency-cannabis

and here:

http://www.growweedeasy.com/phosphorus-deficiency-cannabis

 

[Dagmonkey]

What's your ppm?

I have no way to check.

 

[VenomGrower6990]

Looks like you have deficiencies and Nute burn so maybe too much of one nutrient and not enough of another.

 

[714steadyeddie]

Get a TDS meter from Amazon. $14 with shipping.

Best $14 I ever spent.

 

[whitebb2727]

Get a good pic of the whole plant(s).

T5 does get hot. I run 432 watts of t5 in a 2x4 cabinet.

 

[ChiefReese]

Wow. This is terrible. I wrote a really long post and it seems to have disappeared. The long and short of it is that my plants are dying.

The Basics:

First grow
Week 4 flower
Soil: Happy Frog
Amendments: dolomite lime, last week week.
Nutes: 10 ml Iguana Juice Bloom + 1 tsp Calimagic per gallon H2O
pH: About 6.2 to 6.4

Anyway, last week I got advice on a calcium deficiency. Have been treating. But my plants are still looking unhealthy. I am at a loss as to what I am doing wrong. There are healthy parts and dying parts on each plant. I am growing them under T5HO, but my cabinet is overheating so I have to leave the door open with a fan on. Trying to correct it but I think I have created light leaks, and I am too sick and tired of dealing with problems to fix it. Guess I will have seeds, too.


View attachment 3659627 View attachment 3659635 View attachment 3659631

Hey Dagmonkey! I'm not sure your plants have a calcium deficiency as that is characteristic of leaves with random brown spotting. From your situation I'd say that you're problem is heat stress and that can be remedied by getting some kind of exhaust. Some of that heat needs to leave the cabinet rather than be just circulated by the fan. I grow hydro now but when I used soil I used FoxFarm too! I found that their Ocean Forest blend was perfect for the flowering stage as I got sturdy branches which equaled massive buds! And for the light leaks, I'm not sure if your situation but perhaps move the cabinet to a sealed-off or less frequented area?

 

[Dagmonkey]

Looks like you have deficiencies and Nute burn so maybe too much of one nutrient and not enough of another.

Exactly! It is driving me nuts.

 

[Dagmonkey]

Get a TDS meter from Amazon. $14 with shipping.

Best $14 I ever spent.

Will do. I just got to the point where 14 dollars won't break the bank. Whew!

 

[Dagmonkey]

Get a good pic of the whole plant(s).

T5 does get hot. I run 432 watts of t5 in a 2x4 cabinet.

Will try to post one later. Have passive intake through the bottom and a 6" duct fan exhaust out the top of a 2.25'×5'×4.25' plywood home brew box. Our space is very specific dimensionally and I built my own to maximize. Room temp is a full 15 degrees F below box temp. Am going to move exhaust to top right side of box (rather than center of top) and run a 4" intake fan from the bottom left side for next grow.

 

[Dagmonkey]

Hey Dagmonkey! I'm not sure your plants have a calcium deficiency as that is characteristic of leaves with random brown spotting. From your situation I'd say that you're problem is heat stress and that can be remedied by getting some kind of exhaust. Some of that heat needs to leave the cabinet rather than be just circulated by the fan. I grow hydro now but when I used soil I used FoxFarm too! I found that their Ocean Forest blend was perfect for the flowering stage as I got sturdy branches which equaled massive buds! And for the light leaks, I'm not sure if your situation but perhaps move the cabinet to a sealed-off or less frequented area?

They definitely did have calcium deficiency, but it has been handled. I think you are right. I added more light to the box and when I moved the temp probe to top of canopy I found it had been hitting the low 90s.

This box needs to stay where it is. We will see what I can do with an active intake.

 

[whitebb2727]

Will try to post one later. Have passive intake through the bottom and a 6" duct fan exhaust out the top of a 2.25'×5'×4.25' plywood home brew box. Our space is very specific dimensionally and I built my own to maximize. Room temp is a full 15 degrees F below box temp. Am going to move exhaust to top right side of box (rather than center of top) and run a 4" intake fan from the bottom left side for next grow.

Where do you get rid of the exhaust? Preferably exhaust outside. At least to another room. For passive you need double if not triple the intake hole. For my four inch fan I have a 4x12 inch hole for my intake.

Mine is in a basement and that helps a lot.

 

[Dagmonkey]

Room temp is 75 at peak

 

[Dagmonkey]

Where do you get rid of the exhaust? Preferably exhaust outside. At least to another room. For passive you need double if not triple the intake hole. For my four inch fan I have a 4x12 inch hole for my intake.

Mine is in a basement and that helps a lot.

Mine is 12 degrees over ambient with the 3'x4' door off and the T5HO fixture 6" above plants.

 

[Dagmonkey]

Room temp at this moment is 68. Highest I have seen is 75 but back then the box was at 79-80. I think the problem might be the reflectors on the highbay I put in. I noticed that they were installed in a way that might be focusing too much light on the center. The reflector is curved along the length of it in addition to the standard curvature along the width. I loosened the screws to take the bend out of the center of the reflector and it straightened out a little.

We decided just to make seeds. Two plants have bananas, one does not. One plant is an early harvest. The other two (the most feminine and the heaviest yielder) will get crossed. Make hay while the sun shines, I guess.

 

[Cyrus420]

Your plants are going to yellow as they near harvest.

The spotting on the new growth seems to indicate a calcium deficiency I amend my watering with liquid calcium and magnesium to off set this.

As for the yellowing it seems to me maybe you have a little too much nitrogen in your soil or have over-nuted on your bloom nutes. I would feed with a plain watering and resume at 1/2 watering schedule.

 

[whitebb2727]

Mine is 12 degrees over ambient with the 3'x4' door off and the T5HO fixture 6" above plants.

Where do you exhaust? Don't recirculate the air from the cab to the room back to the cab. Run your exhaust out of the house if you can. Attic or something like that at the least. You need good air exchange.

 

[$bkbbudz$]

Looks like you have deficiencies and Nute burn so maybe too much of one nutrient and not enough of another.

Direct and right to the point...nothing vague about this reply at all...

LOL!!!!! Just kiddin witcha Venom!!

 

[$bkbbudz$]

Just read through this afternoon/evenings posts. While there is definitely a temp and ventilation issue going on here, especially if it gets into the 90's. But, the visible problems here are nute related, not temperature stress. Have you read the links I provided and done other research based on what you learned there?