Calcium deficiency?

[Tref]

Hi all,

This is my first grow and I've got through to flowering and am hoping to harvest soon. I have 3 plants which all get the same treatment (in terms of lighting, nutes, etc). Lately one of the plants has started to look sick - brown spots on new leaves and some leaves yellowing/dying at the base of the plant. It looks to be like clacium deficiency but I use calmag on each feed and am sticking around pH6. The other two plants don't seem to be affected at all...any help on how I can fix this to ensure the harvest doesn't get ruined?

 

[JimmiP]

Yellowing leaves near the bottom is normal.
What are you growing in?

 

[Tref]

60% buffered coco coir and 40% perlite.

 

[curious2garden]

Hi all,

This is my first grow and I've got through to flowering and am hoping to harvest soon. I have 3 plants which all get the same treatment (in terms of lighting, nutes, etc). Lately one of the plants has started to look sick - brown spots on new leaves and some leaves yellowing/dying at the base of the plant. It looks to be like clacium deficiency but I use calmag on each feed and am sticking around pH6. The other two plants don't seem to be affected at all...any help on how I can fix this to ensure the harvest doesn't get ruined?

It looks like a Ca deficiency but can't really tell or see anything else since you are under blurples. Take a pic under natural light if you want more help.
Thanks

 

[JimmiP]

Well, it looks like they have a few weeks to go. And I don't do any type of hydro anymore. So hopefully some coco growers show up soon.
My guess is it's ph related as you have what appears to be phosphorus issues too.
If you want some good advice, I would tell everyone, everything you are using and how often it's being used. Then someone will be able help out more effectively.
Good luck friend!
Ps - I would recommend for your next grow going with organic soil with little to no supplemental feeding. Just let the roots fill the container and then move to a bigger one. Then you can get to know the plant and how it grows a little better before diving into other methods of growing.

 

[curious2garden]

Well, it looks like they have a few weeks to go. And I don't do any type of hydro anymore. So hopefully some coco growers show up soon.
My guess is it's ph related as you have what appears to be phosphorus issues too.
If you want some good advice, I would tell everyone, everything you are using and how often it's being used. Then someone will be able help out more effectively.
Good luck friend!
Ps - I would recommend for your next grow going with organic soil with little to no supplemental feeding. Just let the roots fill the container and then move to a bigger one. Then you can get to know the plant and how it grows a little better before diving into other methods of growing.

I started in hydro, in home made NFT rails. I killed everything in soil and sadly still do. Some people, like me don't find soil easier.

 

[JimmiP]

I started in hydro, in home made NFT rails. I killed everything in soil and sadly still do. Some people, like me don't find soil easier.

I too grew hydro. I started in high-school ag with ebb and flow. Then dwc and rdwc. And we always did well. But then I got to where I didn't want to keep track of things as often. And I like to go away for a few days and such. So in the end soil just works out better for me.
Have you ever tried water only, soil growing? No ph'ing, just tap water. Not saying you have to or anything. I have just found that sometimes people try to hard to tell the plant what it needs with bottled nutritional supplements. And that, in turn ends up causing a bunch of different issues. I mean in the end to each their own. I liked growing in hydro back then. We had great results most of the time and at least decent results the rest. But our outdoor guerilla grows (minus occasional bug and fungal issues) always gave us more without doing much of anything. So I decided to roll with that and pay more attention to IPM. Since flipping that way everything has got bigger, better and most important to me simplified.
Either way you shake it, I hope the op gets that straightened out.
Good luck friends!

 

[myke]

60% buffered coco coir and 40% perlite.

Are you feeding correctly? Coco is hydro,feed it as such and all is good.

 

[curious2garden]

I too grew hydro. I started in high-school ag with ebb and flow. Then dwc and rdwc. And we always did well. But then I got to where I didn't want to keep track of things as often. And I like to go away for a few days and such. So in the end soil just works out better for me.
Have you ever tried water only, soil growing? No ph'ing, just tap water. Not saying you have to or anything. I have just found that sometimes people try to hard to tell the plant what it needs with bottled nutritional supplements. And that, in turn ends up causing a bunch of different issues. I mean in the end to each their own. I liked growing in hydro back then. We had great results most of the time and at least decent results the rest. But our outdoor guerilla grows (minus occasional bug and fungal issues) always gave us more without doing much of anything. So I decided to roll with that and pay more attention to IPM. Since flipping that way everything has got bigger, better and most important to me simplified.
Either way you shake it, I hope the op gets that straightened out.
Good luck friends!

I just can't stop watering them. Nothing can hold me back on it. I even bought one of those water meters. But I'm good with whatever way someone grows. All growing paths lead to cannabis and that's a nice thing

 

[Tref]

Thanks for the responses everyone! Below are some more details (and pictures in natural light). Also, I'm growing in coco coir because my first two attempts in soil failed - having extra control over the medium has helped me resolve issues.

Lights: 200W LED (California Lightworks System 275)
Grow room: 3x3 tent
Medium: 60% buffered coco coir, 40% perlite
Nutrients: Flo Trio Series and Calmag (I've attached the schedule)
Water schedule: Nutes one day, pH'd water the next. pH ranges between 5.5-6.5 (as I'm near the end I'm generally staying around 6.2). I always have 20-30% runoff.
Strain: Girl Scout Cookie Autoflower
Light Schedule: 18/6
Temp: 20C day, 14C night (on average)
Relative humidity: Usually around 55% day and 65% night. I do everything possible to bring it down but I live in a humid area (+80% RH)...

It definitely looks like a Calcium deficiency. JimmiP it could definitely be phosphorous lockout too as my pH may be a bit high. I'll try watering the next few rounds at pH 5.9. Any other tips? And thanks again!

 

[myke]

Water schedule: Nutes one day, pH'd water the next. pH ranges between 5.5-6.5

Theres your problem.Your not feeding it like hydro.

 

[Tref]

Apologies I forgot to add the nutrient schedule. It's a specific schedule for coco coir.

@myke is there a more suitable nutrient schedule I should be using? Any advice is greatly appreciated!

 

[myke]

Apologies I forgot to add the nutrient schedule. It's a specific schedule for coco coir.

@myke is there a more suitable nutrient schedule I should be using? Any advice is greatly appreciated!

Weird feed schedule. Feed to runoff everyday and it’s so much easier. Coco is hydro. You don’t get problems this way. Your plants look ok really considering your fertigation schedule.

 

[myke]

Plants that size you could feed twice a day. Just don’t let the plant sit in the runoff. Maybe too late for this run but outside coco isn’t supposed to get dry so kinda hard to do outdoors.

 

[Tref]

I'll start feeding each day and ensure there is runoff. The nutrient schedule tends to come out around 550ppm. Maybe that's why the plant is suffering from phsophorous deficiency? Again, thanks the for the tips!

 

[myke]

I'll start feeding each day and ensure there is runoff. The nutrient schedule tends to come out around 550ppm. Maybe that's why the plant is suffering from phsophorous deficiency? Again, thanks the for the tips!

Thats ok,about where you want it.Just needs it at least once a day

 

[RottyRzr]

So what kind of deficiency if any did you come up with?

 

[MickFoster]

Water schedule: Nutes one day, pH'd water the next.

This is a problem.........never plain water in coco.

 

[Tref]

So what kind of deficiency if any did you come up with?

There's definitely calcium deficiency and potentially phosphorous too.

I've stopped using plain water and am now adding nutes each day. I'll post an update here in a week or so to determine if the problem has gone away.

 

[myke]

There's definitely calcium deficiency and potentially phosphorous too.

I've stopped using plain water and am now adding nutes each day. I'll post an update here in a week or so to determine if the problem has gone away.

Is she drinking?