Cococore hpcc killing plants

G

Got questions

Member

• Jan 22, 2020

• #1

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

Well-Known Member

• Jan 22, 2020

• #2

My first guess was ya treated coco like soil and plants didn't like it

 

Dumbguyneedshelp

Well-Known Member

• Jan 22, 2020

• #3

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

Well-Known Member

• Jan 22, 2020

• #4

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

 

G

Got questions

Member

• Jan 22, 2020

• #5

I've grown for four years with great results. Switched back and forth between soil and coco core no problems. Like said transplanted then all died. Cocos pretty wet clearexed all plants that died if anything worried was too wet..heres a pic of the last four trying to save

 

Attachments

• 
  15797500811711851060378.jpg

  1.5 MB · Views: 12
• 
  1579750158535-126103271.jpg

  658.3 KB · Views: 11

Dumbguyneedshelp

Well-Known Member

• Jan 22, 2020

• #6

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

Well-Known Member

• Jan 22, 2020

• #7

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

• Jan 22, 2020

• #8

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.

 

G

Got questions

Member

• Jan 22, 2020

• #9

20-800ppm coco out of the bag

 

G

Got questions

Member

• Jan 22, 2020

• #10

Dirty coco is what I'm thinking. Try to test it somehow

 

Aussieaceae

Well-Known Member

• Jan 22, 2020

• #11

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.

 

G

Got questions

Member

• Jan 22, 2020

• #12

As for feeding the last four that have been clearexed using technaflora b.c nutes half dose cal mag included. Put 250ppm in 500 ppmrunoff.

 

Aussieaceae

Well-Known Member

• Jan 22, 2020

• #13

Got questions said:

As for feeding the last four that have been clearexed using technaflora b.c nutes half dose cal mag included. Put 250ppm in 500 ppmrunoff.

Click to expand...

Cool man, you're probably doing things right, should be fine once you get the runoff down.

 

G

Got questions

Member

• Jan 22, 2020

• #14

I'm gonna keep flushing the out of the bag stuff with r.o. Try to get it down. Gonna test the last of the bag somehow.

 

Aussieaceae

Well-Known Member

• Jan 22, 2020

• #15

Got questions said:

I'm gonna keep flushing the out of the bag stuff with r.o. Try to get it down. Gonna test the last of the bag somehow.

Click to expand...

Give the rest of the bag a soak with ro, wait, then test that water.

 

Aussieaceae

Well-Known Member

• Jan 22, 2020

• #16

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

Well-Known Member

• Jan 22, 2020

• #17

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!

 

curious2garden

Well-Known Mod

Staff member

• Jan 22, 2020

• #18

50/50 coco/xlg perlite



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

 

Last edited: Jan 22, 2020

C

CannaCountry

Well-Known Member

• Jan 23, 2020

• #19

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.