What has happened to my plants?

[CBDseeker]

First time grower here. Growing with coco, 5x5 tent. 12x4ft bridgelux strips

Started off with problems as I didn't make the drainage holes properly. Eventually I changed them to bigger pots and gave them a feeding. They loved it and thrived and all was right in the world.

After a week or so I gave them their second watering that wasn't just PhD water. My local hydro store guy said for the next watering to give them cal mag. Everything since then has been chaos.

After watering with them with cal mag they completely stopped growing, and the back left one started getting some kind of disease or something happening to it then I started doing stupid things in a panic like feeding them again and then flushed the messed up one etc. Now the other 3 have started having black dots appear on the leaves

Last time I watered these I watered all 4 with calmag. I would love to hear what you all have to say about the pictures I'm posting such as:

what the really messed up one had going on with it,

what the black spots are on the others,

if I should just be feeding them everytime or doing a watering of calmag in between

Any sources for things that i should read or watch to level up my knowledge on growing marijuana in general.

I know this crop is probably not going to end well but I would like to learn as much as I can with this batch before starting on a next batch

Thank you very very much in advance for your help.

 

[whitebb2727]

Chronic under watering. Feed them with a grow or veg nute.

 

[Xs121]

First time grower here. Growing with coco, 5x5 tent. 12x4ft bridgelux strips

Started off with problems as I didn't make the drainage holes properly. Eventually I changed them to bigger pots and gave them a feeding. They loved it and thrived and all was right in the world.

After a week or so I gave them their second watering that wasn't just PhD water. My local hydro store guy said for the next watering to give them cal mag. Everything since then has been chaos.

After watering with them with cal mag they completely stopped growing, and the back left one started getting some kind of disease or something happening to it then I started doing stupid things in a panic like feeding them again and then flushed the messed up one etc. Now the other 3 have started having black dots appear on the leaves

Last time I watered these I watered all 4 with calmag. I would love to hear what you all have to say about the pictures I'm posting such as:

what the really messed up one had going on with it,

what the black spots are on the others,

if I should just be feeding them everytime or doing a watering of calmag in between

Any sources for things that i should read or watch to level up my knowledge on growing marijuana in general.

I know this crop is probably not going to end well but I would like to learn as much as I can with this batch before starting on a next batch

Thank you very very much in advance for your help.

If you're having high humidity issue, those black spots could be sign of fungus infection. Hope I'm wrong.

 

[CBDseeker]

I

If you're having high humidity issue, those black spots could be sign of fungus infection. Hope I'm wrong.

I have been keeping my humidity crazy high. Where should the humidity be at? Also what so you think is wrong with the really bad one?

 

[ukflowzy]

I

I have been keeping my humidity crazy high. Where should the humidity be at? Also what so you think is wrong with the really bad one?

Looks like a zinc/ magnesium deficiency! I’d say start again if I’m honest! Maybe try watering your plants every 3-5 days depending on how dry the soil is with about 300-500ml of water( water when the top layer of soil looks dry) better to slightly underwater than over water imo! Water then like this for first 2-3 weeks! After 3 weeks add low amounts of nutrients! Then water the same every 3-5 days with 500 ml! After 6 weeks water with around a litre and this should be fine! This works for me anyway dude

 

[ukflowzy]

Looks like a zinc/ magnesium deficiency! I’d say start again if I’m honest! Maybe try watering your plants every 3-5 days depending on how dry the soil is with about 300-500ml of water( water when the top layer of soil looks dry) better to slightly underwater than over water imo! Water then like this for first 2-3 weeks! After 3 weeks add low amounts of nutrients! Then water the same every 3-5 days with 500 ml! After 6 weeks water with around a litre and this should be fine! This works for me anyway dude

I religiously water mine every 3 days no matter what! But the first few weeks it was every 5 days! You just gotta be careful as there’s no guide just let the plants tell you when they need a water

 

[Olive Drab Green]

They are either overwatered or homosexual. Your guess is as good as mine.

 

[CBDseeker]

Looks like a zinc/ magnesium deficiency! I’d say start again if I’m honest! Maybe try watering your plants every 3-5 days depending on how dry the soil is with about 300-500ml of water( water when the top layer of soil looks dry) better to slightly underwater than over water imo! Water then like this for first 2-3 weeks! After 3 weeks add low amounts of nutrients! Then water the same every 3-5 days with 500 ml! After 6 weeks water with around a litre and this should be fine! This works for me anyway dude

Are you growing in coco? Also if you are, would you not end up with nute burn if you're only watering them 500 ml each time you water them? No way a full grown plant is going to get 10 percent runoff with 500 mls no?

 

[ukflowzy]

Are you growing in coco? Also if you are, would you not end up with nute burn if you're only watering them 500 ml each time you water them? No way a full grown plant is going to get 10 percent runoff with 500 mls no?

The 500ml is only for first 3 weeks ish! Just up your watering amounts I till there is decent run off! I water with about 2-3 litres atm every 3 days! 3 litres to the bigger plants and the ones by fans etc as they seems too dry out faster! Well no, no nutrient burn as if your bottle says 40ml per 10l you’d use 4ml for a litre and then 2ml for 500ml? Your best bet is too get a 10L tank and make it up for a fair few waters but I’d recommend only putting in half of what your bottle says and just up them gradually after 5 weeks ish

 

[ukflowzy]

Are you growing in coco? Also if you are, would you not end up with nute burn if you're only watering them 500 ml each time you water them? No way a full grown plant is going to get 10 percent runoff with 500 mls no?

Yes coco btw

 

[whitebb2727]

Dude. Serious. Chronic under watering.

That's a smart pot. It dries out faster than regular pot.

You need to water thouroughly. Water until the point of good run off. Water twice. Water lightly and then again in about ten minutes.

I see signs of under watering in the pics. Limp leaves.

Soil can develope dry pockets that become hydrophobic.

Put the pots in a bowl or gray and water with plain water and let the pots sit in the water until the soil sucks it all up.

Your next watering feed them good.

I've seen this and done it myself.

 

[Xs121]

I
I have been keeping my humidity crazy high. Where should the humidity be at? Also what so you think is wrong with the really bad one?

You have to give us your info, like....

What's your RH...crazy high is not a specific data
What's your temp
What's your runoffPH and/or EC
How often you water
What else are you feeding your plant?
Light?

In other words dude...walk us to your grow room...we're not there....the more detailed info you can provide, we might get a chance to diagnose your problem right......otherwise...everything you read here is just guesses on our part.

 

[CBDseeker]

You have to give us your info, like....

What's your RH...crazy high is not a specific data
What's your temp
What's your runoffPH and/or EC
How often you water
What else are you feeding your plant?
Light?

In other words dude...walk us to your grow room...we're not there....the more detailed info you can provide, we might get a chance to diagnose your problem right......otherwise...everything you read here is just guesses on our part.

My temp is usually around 80f.

Humidity usually around 80rh

The water I put in when I flushed the one that's really bad was a ph of 6.0 (no nutes)
What came out first bucket was 6.7ph-677 tds
Second bucket 6.8-530tds
Third bucket 6.9 -466 TDs

With other plants last time I watered, the water going in was 5.66ph 250 tds(calmag) and came out 6.6. Tds or one plant was 450, other was 500.

Here's the foods I use.

Let me know if any other details would help

 

[CBDseeker]

Dude. Serious. Chronic under watering.

That's a smart pot. It dries out faster than regular pot.

You need to water thouroughly. Water until the point of good run off. Water twice. Water lightly and then again in about ten minutes.

I see signs of under watering in the pics. Limp leaves.

Soil can develope dry pockets that become hydrophobic.

Put the pots in a bowl or gray and water with plain water and let the pots sit in the water until the soil sucks it all up.

Your next watering feed them good.

I've seen this and done it myself.

Thanks for the tip I'll make sure to give em water more often. I dknt understand your third last paragraph about the bowm though or when I should be doing that.

 

[whitebb2727]

Thanks for the tip I'll make sure to give em water more often. I dknt understand your third last paragraph about the bowm though or when I should be doing that.

Air pots can be hard to water. You place a drip tray under the pot and water them and leave the run off. The pot sits in the water that drained through and soaks it up.

Only do it with pure water. Doing it with nutes can cause salt build up.

Soaking allows the soil to wick or soak the water up and rid any dry spots.

The black spots are necrosis. Without proper watering the plants will cannibalize the lower leaves.

 

[whitebb2727]

Soil needs a wet to dry cycle. As soil dries the pH swings to allow proper nutrient uptake as different elements are uptaken at different pH.

Too wet or dry causes a pH problem on top of the watering problem.

 

[Jimdamick]

Your humidity is way too high, try too bring it down to 60% (fans help).
It doesn't look like underwatering too me, but it definitely needs more Nitrogen.
Are you adding Calmag (it has added N) to your nutes?
With coco it should be added once every 2 weeks.
So, I would recommend bring your humidity down, use fans, and bump up your nutes and add Calmag.
That should help.
Good luck

 

[CBDseeker]

K so I lowered the humidity and gave them a full feeding. I got new growth and most of the plant started to perk up, but the bottom leaves started to get weird(pictures attached) and even the the top leaves are weird colouring(bright spots)

What you guys think they need now, or are getting too much of?

And thanks for the help so far

 

[CBDseeker]

Any input on the updated pictures after feeding em again?

I religiously water mine every 3 days no matter what! But the first few weeks it was every 5 days! You just gotta be careful as there’s no guide just let the plants tell you when they need a water

 

[CBDseeker]

Soil needs a wet to dry cycle. As soil dries the pH swings to allow proper nutrient uptake as different elements are uptaken at different pH.

Too wet or dry causes a pH problem on top of the watering problem.

What you think about the updated pics?