I don't usually ask, but I really need a solution.

[USMCSkywalker]

Growing indoors
Conditions: 78° - 88° / 40 - 50 RH%
3 Gallon Pots
Mother Earth Coco Coir 70% / Perlite 30%
pH between 5.8-6.3 checking every feed
Last watering / feeding on April 8th
Canna Coco A 15 mL & B 15 mL / 3.8 L or 900ppm

On April 3rd my plant was green and looking mostly healthy, now on the 10th I feel she is slowly dying. Please help me prevent this.

Can't tell if it's nutrient lockout, nutrient burn, magnesium deficiency, potassium deficiency it just doesn't look healthy.
I'm lost.

 

[USMCSkywalker]

Lights: 2x Mars Hydro TS600 / 200 Actual Watts

Had at about 22" above the top of plants, just moved to 26".

P.S. - Second plant at bottom right starting to get the same bleached tips on some leaves like the green is being zapped from them.

 

[MrGreenFingers99]

Do you feed to runoff everytime to clear salt build ups? Also have you checked your runoff PH and PPM?
Looks like K deficiency but I think it will be caused by lockout rather then underfed as they looked well fed a few days ago!

 

[USMCSkywalker]

Do you feed to runoff everytime to clear salt build ups? Also have you checked your runoff PH and PPM?
Looks like K deficiency but I think it will be caused by lockout rather then underfed as they looked well fed a few days ago!

Thanks for the reply.
I've been watering till runoff for the last few weeks or so.
My runoff on the 7th showed my pH at around 6.15 and 600ish for ppm.
I was thinking that too, but I can't find any pics that look like mine to confirm. Ugh.. this is stressful.

 

[MrGreenFingers99]

Thanks for the reply.
I've been watering till runoff for the last few weeks or so.
My runoff on the 7th showed my pH at around 6.15 and 600ish for ppm.
I was thinking that too, but I can't find any pics that look like mine to confirm. Ugh.. this is stressful.

Ok so what were the input numbers and are you feeding on every watering everyday?

 

[USMCSkywalker]

Ok so what were the input numbers and are you feeding on every watering everyday?

5.8 - 6.3 pH
was feeding between 400 - 600 ppm until the last watering where I went up to like 800+ ppm.
I was watering daily up until about a week ago where I started letting it dry out entirely.

Hmm. Your questioning is making me think it is in fact a lockout.

 

[MrGreenFingers99]

5.8 - 6.3 pH
was feeding between 400 - 600 ppm until the last watering where I went up to like 800+ ppm.
I was watering daily up until about a week ago where I started letting it dry out entirely.

Hmm. Your questioning is making me think it is in fact a lockout.

I think you may have salt build up in the medium, I grow DWC so far from a coco expert but I think you should be feeding daily with runoff, i would personally be checking the input of the PH and PPMS and then check the output numbers for a couple days just to make sure everything is in range, hopefully an experienced coco grower can chime in here.

 

[Fevs.]

5.8 - 6.3 pH
was feeding between 400 - 600 ppm until the last watering where I went up to like 800+ ppm.
I was watering daily up until about a week ago where I started letting it dry out entirely.

Hmm. Your questioning is making me think it is in fact a lockout.

Go back to ---- I was watering daily up until about a week ago where I started letting it dry out entirely. ----

When you let coco dry out completely the ph swings a fair bit.

I think you answered your own question to your own problem. It's coco, so why are you letting it dry out like soil?

 

[Fevs.]

Get your plants out, put them over the sink on a rack then feed them 20litres of ppm 600 ish feed. But half way through each wait 15 minutes for excess salts to dissolve. Then feed them the other half.

 

[USMCSkywalker]

I think you may have salt build up in the medium, I grow DWC so far from a coco expert but I think you should be feeding daily with runoff, i would personally be checking the input of the PH and PPMS and then check the output numbers for a couple days just to make sure everything is in range, hopefully an experienced coco grower can chime in here.

I believe you are right, the fact that they're fabric pots can't be helping.
I appreciate that, I'll get right on it.

Once everything is regulated does the yellowing go back to green or will it remain yellow?

 

[Fevs.]

3 easy ways to mess up your plants in coco. 1. coco drying out. 2. feeding plain water when it doesn't need it. 3. overfeeding.

 

[USMCSkywalker]

Go back to ---- I was watering daily up until about a week ago where I started letting it dry out entirely. ----

When you let coco dry out completely the ph swings a fair bit.

I think you answered your own question to your own problem. It's coco, so why are you letting it dry out like soil?

Good point. This is my first grow so a lot of conflicting advice was coming into play. If it ain't broke don't fix it, should've kept on what I was doing.

 

[USMCSkywalker]

Get your plants out, put them over the sink on a rack then feed them 20litres of ppm 600 ish feed. But half way through each wait 15 minutes for excess salts to dissolve. Then feed them the other half.

Thank you so much. On it right now.

 

[Fevs.]

I grow 6 plants. I have a large nutes mixing catering pot for my nutes mixing. I get 2 1/2 litres per plant and they are singing. But if I feed that whole lots to just just 3 of the plants, they get 5 litres. They are singing and dancing. It's just a pain as I have to make up more nutes. But worth it when they get double. We must just not realise how many salts are retained in the coco.

 

[Fevs.]

Good point. This is my first grow so a lot of conflicting advice was coming into play. If it ain't broke don't fix it, should've kept on what I was doing.

My plants are ahead of your in age and size, but I'm still feeding my plants Canna coco a and b at 600 ppm. I'm tempted to up it, but they are so happy. You know when the time is right, you'll just look at them one day and think 'are they slightly lighter?' Then up the feed and the next time you see them they are superb. But the try and remember how old they were and how big they were when you up the nutes, then next grow just do it the week before.

 

[MrGreenFingers99]

I believe you are right, the fact that they're fabric pots can't be helping.
I appreciate that, I'll get right on it.

Once everything is regulated does the yellowing go back to green or will it remain yellow?

No the damaged leaves wont recover, you want to be looking at the new growth coming through to make sure there recovering but just be aware some of the new stuff will probably be affected also so it might take the 2nd set of new growth to see the improvements.

 

[USMCSkywalker]

No the damaged leaves wont recover, you want to be looking at the new growth coming through to make sure there recovering but just be aware some of the new stuff will probably be affected also so it might take the 2nd set of new growth to see the improvements.

That sucks. I just need to finish this grow and be done with it.

 

[Fevs.]

That sucks. I just need to finish this grow and be done with it.

Seriously, don't you worry one bit over this. Overall things are ok. I bet you in 1 month you can even see any of the damaged leaves.

Make the most of it. Find any damaged leaves in the centre of the plant that are blocking the light getting to other branches and nodes. Then remove them and let the new branches grow up. Take advantage of this situation. It will bounce right back with vigour.

The older leaves on the bottom will probably be whipped off by you when you lollipop. By then end of the grow you won't even see any.

Be careful when they get dry in coco. The plant will just go crusty and die. I killed one plant like that just by being 4-5 hours late on the feed. It was crispy dead.

 

[Fevs.]

Like this...

Strip off many leaves in the middle



Same plant 72 hours later

 

[USMCSkywalker]

Seriously, don't you worry one bit over this. Overall things are ok. I bet you in 1 month you can even see any of the damaged leaves.

Make the most of it. Find any damaged leaves in the centre of the plant that are blocking the light getting to other branches and nodes. Then remove them and let the new branches grow up. Take advantage of this situation. It will bounce right back with vigour.

The older leaves on the bottom will probably be whipped off by you when you lollipop. By then end of the grow you won't even see any.

Be careful when they get dry in coco. The plant will just go crusty and die. I killed one plant like that just by being 4-5 hours late on the feed. It was crispy dead.

Okay so take it as a chance to defoliate?
I'll make sure to water daily at the same time keeping the ppm at around 600.
Thanks, I was getting discouraged.