New Grow Same Problem!

More cal/mag?

Did you buffer your coco?

Doesn't look like it. K is locking out calcium and everytime you feed, the K sticks and the calcium washes out.

Hence, the K tox/Ca def.

What is PL that you have mixed with the coco?

Those two plants at the back just say moisture stress to me why they gone all parched at the top.

Now there can be a lot of issues but across the boards watering and ferts are massive so id start there.

I hate to try and diagnose, watch for changes either varying the ferts or waterings.

otherwise probably environment but most should have that reasonably dialled in by now.

Cal/mag, its like a myth to me, if ferts dont instantly solve it it wasnt that

It's look like Cal/mag but also I can apreciate anothers sistoms, so for us to help you better, could you please let us know, how old is it the plant? how often do you irrigate? Ph of the water for irrigate? and if the plant did you get from seeds or cuttings? I think the Ph it's kinda down for that size of the plant.

3rd Monkey said:

What is PL that you have mixed with the coco?

Click to expand...

My coco is pre buffered and I am using promix PL

Andino said:

It's look like Cal/mag but also I can apreciate anothers sistoms, so for us to help you better, could you please let us know, how old is it the plant? how often do you irrigate? Ph of the water for irrigate? and if the plant did you get from seeds or cuttings? I think the Ph it's kinda down for that size of the plant.

Click to expand...

The plant is 47 days old from seed. I use autopots to the aqua valve floods to bottom feed. I use 5.8 ph for watering. Plants are all from seed.

Do you feed them cal/mag? I run coco and feed them a little every water. PL you meen perlite right?

Get a bottle of calmag and take your pots out of the trays and top water until run off with a good dose.

You are aware your Perlite is slowly releasing K?

3rd Monkey said:

K is locking out calcium and everytime you feed, the K sticks and the calcium washes out.

Click to expand...

I agree with this ^

swazifarmer said:

You are aware your Perlite is slowly releasing K?

Click to expand...

Now the slow release is fine and moderate but your adding on top of that which would create a big build up of K eventually. If I’m right you’re last grow would’ve ran into the same issues at roughly the same time period.

swazifarmer said:

Now the slow release is fine and moderate but your adding on top of that which would create a big build up of K eventually. If I’m right you’re last grow would’ve ran into the same issues at roughly the same time period.

Click to expand...

Yes thats right around the same time as my last grow i had the same issues. Should I do a good flush with ph water then keep feed normally without the cal mag?

I think i am going to start doing a ph water flush every time i change my res water. I will have calmag added in with the new mix. This way every week or so the coco will be flushed of salts and build ups. Think this will be a good idea?

speed420 said:

Yes thats right around the same time as my last grow i had the same issues. Should I do a good flush with ph water then keep feed normally without the cal mag?

Click to expand...

You might not need to flush, like I said the slow release is moderate so it’s your feeding that’s the problem.

swazifarmer said:

You might not need to flush, like I said the slow release is moderate so it’s your feeding that’s the problem.

Click to expand...

Feeding should be fine 500ppm the plants are autos and 47 days old from seed

speed420 said:

Feeding should be fine 500ppm the plants are autos and 47 days old from seed

Click to expand...

Flushing won’t remove all the slow release nutrients hence why I said ease up of feeding.

Coco. Common practice and recommended to feed at varying PH. 5.7 thru 6.3. Fresh water alone, not recommended for coco.

This is my go to Coco college.
https://cocoforcannabis.com/how-to-prepare-and-buffer-coco-coir/

Dude blaming the perlite is a bit of a stretch. Don’t latch onto that idea.