Cococore hpcc killing plants

G

Got questions

Member
First post. Months ago had thirty plants. Switched to coco hpcc from soil both pro mix. All plants are dead have four newer plants by a month. Always ph water from5.5-6.5. Nuted very little because instant change in weeks. Purple stems and yellow leaves with brown scabs. Just checked new hpcc runoff ph in 6.0 out 5.9. Using r.o water in 20ppm runoff 800. Any idea's?
 
Dumbguyneedshelp

Dumbguyneedshelp

Well-Known Member
I'm still learning myself . but I feed every watering in my coco as it don't really hold nutrients like soil would. Also coco can't get as dry as soil really Point is to have it hydroponically in a sense? Coco is also notorious for needing an extra boost of cal/mg .
 
Dumbguyneedshelp

Dumbguyneedshelp

Well-Known Member
After a 2min search on Google. It seems alot of people are having problems with hpcc. Firat 10posts are hpcc killed my plants. So might be the issue there
 
Dumbguyneedshelp

Dumbguyneedshelp

Well-Known Member
Hmm I'm stumped to. If you used coco coir for the first time I could see where a few issues could pop up. But 4 years successful grows with coco and this is the first time its happened... Is there anything you did differnt this time Than other times
 
Aussieaceae

Aussieaceae

Well-Known Member
Got questions said:
First post. Months ago had thirty plants. Switched to coco hpcc from soil both pro mix. All plants are dead have four newer plants by a month. Always ph water from5.5-6.5. Nuted very little because instant change in weeks. Purple stems and yellow leaves with brown scabs. Just checked new hpcc runoff ph in 6.0 out 5.9. Using r.o water in 20ppm runoff 800. Any idea's?
Click to expand...
Your in is 20ppm, out is 800ppm?
When did you last feed them and how much?

Ideally want nutrient every feeding.
Sure you didn't get dirty / salty coco?
 
G

Got questions

Member
Just changed the strains. Cause had mites had to kill off half a budding crop and lost some great strains. Bugs have been gone for months. The ones that died in hpcc thought might be manganese deffeciency so used Epsom salts for plants. No change.
 
Aussieaceae

Aussieaceae

Well-Known Member
I'd probably try a little dolo lime myself.
It's probably more in need of calcium imo.
Got questions said:
Dirty coco is what I'm thinking. Try to test it somehow
Click to expand...
I'd work on getting that 800 out down first. I'd accomplish this by a light feed of nutrient 400ppm maybe. Then run it through until it meets the input.
Lime the top afterward, i'd get that salty stuff out first.

Hope it helps, good luck.
 
Aussieaceae

Aussieaceae

Well-Known Member
Once you leach it, you'll need to buffer it yourself.
I'd use dolomite, a little for the plants too.
Or calmag and nutrient I guess, you'll just be supplementing often.
 
OldMedUser

OldMedUser

Well-Known Member
Sounds like it needed a good wash before use and likely has a lot of salt in it. That's what screwed up my plants the first and last time I tried coco about 18 years ago. Promix HP for the win!

:peace:
 
curious2garden

curious2garden

Well-Known Mod
Staff member
50/50 coco/xlg perlite

IMG_5949-1.jpegIMG_5908.jpeg

You just have to use good quality coco with the sodium washed out of it.
 
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C

CannaCountry

Well-Known Member
This: "PRO-MIX HPCC MYCORRHIZAE is a blend of peat moss, chunk coir and perlite designed for hanging baskets, long-term planters and containerized perennials. This growing medium has a high water holding capacity"

This: "Always ph water from5.5-6.5"

You'll have to tread carefully when using a 'hybrid' mix, which your HPCC is. You'll also have to dial in your pH...a whole point swing is no bueno. If it were pure coco, you'd want a pH of @ 5.8, if it were pure peat, you'd want a pH @ 6.5....but you can't swing both ways. I've read countless posts where people are confounded over using these hybrid soil mixes. Seems choosing one or the other (peat or coco) works best. Good luck friend.
 
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