Why is this happening? Ideas?

[louise]

I feel its the rot though...thoughts?

I think you might be right, rot in the trunk will certainly compromise the plant's ability to draw water and nutrients.

[Frank Reynolds]

Dont let coco dry out like it is soil. Keep it moist. Ensure there is always runoff after every feed. If you have a plant that will be in vege for an extended period of time over say around 4 weeks or so dont bother using a one part nutrient like canna coco. Keep an eye on humidity. As your plant needed less water as it was perishing you fed it the same ammount. Damping off occured, like i said also keep an eye on humidity levels. a sick plant doesnt need to be fed a shitload of water/nutrients in an attempt to remedy an ailment. Did you grow one variety/strain ?

 

If you would like to read a little on cations, not that it matters... just note coco is not soil and dont treat it as such.

If you recognise that coco itself is inert unlike soil and read the text under subheading "Movement of nutrient from soil to root" you may recognise the differences between coco and soil.

 

http://www.ctahr.hawaii.edu/mauisoil/c_relationship.aspx

That might be worth a read, maybe not all of the text though perhaps the latter half of the text and the introduction.

 

I do have a tendency to over-complicate things though, its in my nature.

 

Hope i was of some assistance, keep at it. Regardless of the update on the meristem what was aforementioned still applies.

 

 

As i've said a lot I believe coco should be used like any other potting media (soil is mineral based and found in the ground) which means not keeping it consistently wet, in part because of it's high cation exchange capacity it has a great ability of storing nutrients, it opens up to problems like this OP with potential rot.

 

Coco is not inert, due to it's high natural levels of potassium chloride it requires less with the nutrient mix, this also forms preferential cation exchange within the media, particularly in regards to calcium. 

 

syb mate if your using soil as a potting mix I feel for ya

[_Puff_Tough_]

Its more or less considered an inert medium. Inerts definition is "Without active chemical or other properties". It contains no primary active macro or micro nutrients that the plant requires for growth in any substantial 'usable' ammount.

 

Every single medium contains mineral composition of some sort - even ceramic particles of hydroton, what is your point ?

 

Potassium content of coco on the market is around 37 parts per million, with every feed fuck all potassium is leached out of coco. . What is your point ? Did you just google that franky?

 

moot point bud,

 

EDIT- Checked your recent coco grow franky ...... Keep improving mate, you'll get there. Might want to look at how franky grows in coco ! Go for it. Want some pruning tips ya expert. I accept bitcoin. Who did you blow for all of those rep points?

Edited November 8, 2015 by _Puff_Tough_

[Frank Reynolds]

More or less or is it defined as an inert medium?

 

Is that an average of all the different available sources of coco in Australia? or just your favourite brand?

 

"Coco is not inert, due to it's high natural levels of potassium chloride it requires less with the nutrient mix, this also forms preferential cation exchange within the media, particularly in regards to calcium. "

 

Not a cryptic message just facts.

 

Ouch the personal attacks hurt man, especially when you take the time out to edit them in

[_Puff_Tough_]

Read my last previous post. Inert as having no real nutritional benefit. No point repeating myself.

 

 

[_Puff_Tough_]

regardless of the fucking drama .... I will continue to standby ozstoners. Im not even on the payroll.

[Earthling]

Well this grow has the same fucking problem. Lost one plant, second plant thinking about it, third is fine. Still only 3 1/2 weeks into flower.

I'm not watering too much, not watering onto the stem at all. What can I do that keeps these two alive and well for the next 4weeks?

Second plant is starting to get dark patches on the trunk which is definitely stem rot and a couple of small branches have dies around the blackness.

 

Help!

 

After this grow a seriously proper sterilization of the room is happening.

[Rsoyakorik]

is it problem with roots?

[itchybromusic]

Well this grow has the same fucking problem. Lost one plant, second plant thinking about it, third is fine. Still only 3 1/2 weeks into flower.

I'm not watering too much, not watering onto the stem at all. What can I do that keeps these two alive and well for the next 4weeks?

Second plant is starting to get dark patches on the trunk which is definitely stem rot and a couple of small branches have dies around the blackness.

 

Help!

 

After this grow a seriously proper sterilization of the room is happening.

just guessing here , but look into ditylenchus dipsaci ,  https://en.wikipedia.org/wiki/Ditylenchus_dipsaci

pathogenic nematode

Edited January 12, 2016 by itchybromusic

[billygoat]

just thinking out loud, but could it be strain related ?  or have you grown the same strain before without issue ?

 

A quick google search brought up similar results to itchy....

 

Stem nematodes perhaps ? 

 

http://medicalmarijuana.com/experts/expert/title.cfm?artID=727