Rusty leaf sickness in Canna Coco mix

This happened within two days of transplanting into a Canna Coco mix.
I bought in error as thought it was a regular potting mix but it seemed a very nice mix just how I’d like it, medium brown, light and airy, just like any decent mix.
Being coco which I’ve only seen in dehydrated blocks before, I’m not sure what I’ve done wrong, I just repotted the seedlings as normal.
They were unmarked by any problems until they were repotted.
The only other point to add is I inserted some new nylon rope as I intended to use a wick system but not all plants with wicks are affected.
Thanks in advance…





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Hope you figure out what’s going on with the baby.

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Overwatered a bit…and what is the pH of the water you use compared to the pH of the runoff?
Cocoa is not soil-- it gets treated like hydro as far as pH and nutrients.
Looks like pH issue at that age-- otherwise, is most likely a disease, or root damage.

You aren’t feeding yet- right?

Gotta ask-- why do you transplant so young?
Usually, people plant the sprouted seeds and let them go until at least 3rd set of leaves before transplanting.
Baby tap roots are delicate- touching or bending them can cause them permanent harm, or even kill them.

Good luck-- hope you can straighten it out!

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Also what brand of coco is it and was it pre washed and buffered some have a lot of salt build up in them or was it canna brand

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This was my question.

Probably overwatered.
Just ride er out bud. :wink:

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it seems like overdose
u’d flush it

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Overdose of what buddy ? Welcome to the OG !

Overdose of Love

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i dunno what u’ve got in ur coco
first 2 weeks it has to drink only water

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Why would you think that ? I feed from sprout, solo cup for scale.

how old is it ? it’s already has N excess and P block

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Of course! Its practically on deaths doorstep 2 weeks later.:grin: Do you have any pictures of your grows or do you just give dated advice. Coco is usually charged with a light nutrient solution Before the seed is planted.

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I mean, for 15 years ago that would be solid advice. I never grew hydro, but people had to hydrate the coir blocks, then rinse the salt out of them, then ph balance them, then charge them with nutes. It’s a lot to go wrong in that process, and certainly used to see people kill plants and seedlings planting directly into unprepared coco.

So he’s not that far off base, even if we’re looking at something much different here.

but yeah this does make him come off as a bit of a “boron expert”
(old forum joke, for years on overgrow there was a troll who would make sock accounts to misdiagnose healthy plants and rant about boron)

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I dont know many folks that grow in coco that dont feed anything for 2 weeks. I cant imagine not charging the medium or feeding anything for 2 weeks. It would be an eternity for a sprout. It was a year here before i felt comfortable giving any advice.

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I prep coco & feed from sprout too, starting at ~2.0EC and ramp up from there, its eliminated a lot of problems I used to have in veg, especially early on. 14 days in you can be 3-4 nodes tall…you better be feeding.

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Yeah, mine get light nutes (Root & Grow) from day one. By third watering, light reg nutes.

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@Afghaniman2 you are growing in coco it is not soil. Right now all the calcium is being locked up by the coco. It was said earlier, coco is not soil. It is much closer to a hydroponic medium and needs to be constantly fed. There are no nutrients in coco, so what you are seeing is essentially a nutrient lockout. Simply begin feeding now, make sure you are using some kind of calcium supplement and your plants will bounce back.

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Yea, im usually at 1.2EC or so from sprout. I won’t even flush my coco with plain water.

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feed from day 1 above ground around 0.8ec and dont wet coco every day let it dry back between feeds when plants are tiny.

When plants are bigger with plenty of rootage daily feeds work on a fert ec around 1.2-1.4

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Is that a typo EC2.0 a mistake ? Man that seems way too high for a newly sprouted seedling. Running ECs that high when plants is in full bloom or even in full veg when they are in final pots when plants are a fair old size is ok. But giving 2.0EC to a seedling WOW man its even high for fully grown plants in coco IMO but just about ok.

In my experience running 2.0ec with full on flowering plants fert salts will 100% still build in your pots over time no matter what size plant is, although it shouldn`t be a problem for your grow, its just a waste of money that your pissing away down drain . But yes it sure seems like a big risk to me running that high for a seedling .

Giving them a fert strength of 0.6-0.8EC works fine without any risk or frying the plant for a few weeks till they have shot up and grown plenty of rootage.

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