Assitance with leaf pics please

Have you let them dry out to the point of wilting recently? Or have you over watered them?
I have experienced similar results. In my situation I thought is was due to letting them get to dry, causing a lock out.

green punk said:

Have you let them dry out to the point of wilting recently? Or have you over watered them?
I have experienced similar results. In my situation I thought is was due to letting them get to dry, causing a lock out.

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No wilting ever! For sure not over watered either.

I'd like to know where on the plant those leaves were. If they're newer growth they indicate a Ca- + P-, but if lower then it's not a Ca- we're looking at. Definitely short on the P uptake/utilization, IMO.

Good point Sea. These are on the top of the plant, newest sets. It is happening in two different locations now actually..

The necrosis that you observe between the leaf veins is a Ca-, then. All are showing P- or utilization issues. If it's occurring mid-plant, then it's something I've never observed, but would cause me to lean towards a K problem, and if low down then Mg-, which would actually be pretty weird because usually Mg- starts as interveinal chlorosis.

Seamaiden said:

The necrosis that you observe between the leaf veins is a Ca-, then. All are showing P- or utilization issues. If it's occurring mid-plant, then it's something I've never observed, but would cause me to lean towards a K problem, and if low down then Mg-, which would actually be pretty weird because usually Mg- starts as interveinal chlorosis.

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Thanks for this.

Sea, do you grow in coco? If so what nutrient lineup are you using? I am getting sick of the Canna as we keep getting - of something or another...

I'm going with this guy, it's a ca- deficiency. I highly doubt it's mg, esp if it's from the top of the plant. K- could be a part of it, but if you're a little to generous on the potassium when you compensate, you could end up locking out ca again...

cut the cali magic out. This also looks a bit like nute burn - top fan leaves being the leaves closest to the light?

if your feeding high, either up your temp/humidity or lower your feed rate. either way I don't think you need cali magic in there, the excess magnesium is definitely going to be messing with things - mainly, like sea said, your Ca/P uptake, which directly effect the plant's mobilization.

BCrocker said:

Thanks for this.

Sea, do you grow in coco? If so what nutrient lineup are you using? I am getting sick of the Canna as we keep getting - of something or another...

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I do/have grown in coir, but the last time I did so I was using a mixed line-up, alternating feeds of Floranova Bloom and Fox Farms Big Bloom, with some Koolbloom (both liquid and dry formulations) thrown in every 10 days or so for good chemical measure. If I had it to do again, I'd do it all organic.

BCrocker said:

Getting an unexpected deficiency throughout a room using the same program as normally.

Canna Coco medium with Canna Coco food, A+B , and GH Calimagic. These are end of week 2 in flower.

K?

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I'm going with this guy, it's a ca- deficiency. I highly doubt it's mg, esp if it's from the top of the plant. K- could be a part of it, but if you're a little to generous on the potassium when you compensate, you could end up locking out ca again...

I have been using the gh calmg product at 5ml/gal like the label says... Maybe this strain needs more

I bet if you separate the Ca from the Mg, and get it to a ratio approaching a 4:1 or 6:1 Ca:Mg, you'll be much happier with your results. And, getting K+ in coir is very easy.

Upper leaves have started to curl on edges and tips are curling upwards.

I've had it with Canna nutrients!

I am switching to plain ol' GH micro and bloom @ 6ml/9ml ... and the rest of the line up is going to be from the agricultural store!!

Serious Ca- shown in post #14.

Seamaiden said:

Serious Ca- shown in post #14.

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It seems like Ca is locked out then.. they are getting 5ml per gal of the GH Calimagic... I'm a little afraid to add more than that.. :s

I don't care for combination Ca:Mg products, the ones I've used don't have a good ratio IMO/IME (especially for growing in coir). Once I began separating out Ca from Mg, I saw huge improvements. If you're able to swing it, you might want to consider trying that, and using a Ca-only product in combination with something like MgSO4 (Epsom salt).

Ca can be given as a foliar feed, thus allowing you to not screw around with the root feeds. So can MgSO4.

I will get some Cal from the agri store tomorrow.. does it matter if its nitrate or carbonate?

Now that I think about it... this all seems to have started since I have used GH Calimagic...

Any idea why? it is a calcium carbonate...