Hank

Changed my mind

Clone

k so im gonna admit I didn't feel like reading thru all that...
So can you post a little summary?

like.. is coco coir like peat moss where you need to offset the acidity with lime? or is coir ph neutral?

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Hank

I don't blame you!
The short answer is no, it is not like peat moss in that regard.

the important bit from the article...
==
Finally, the pH of the medium, when buffered and controlled, remains constant pretty much throughout its useful life. The medium sets its pH at between 5.2 and 6.2, a perfect range, and will hold it there, unlike peat-based products that try to go back to a pH of 4.5 or less within three months of being planted. By using the correct age of coco with the right porosity, coco potting medium should be able to work through almost a year's worth of crops before being changed. The pH stays correct and only the structure changes, limiting the useful period.
==

EMj

Coco works very well as a growing medium. I normally mix in 1/3 hydroton and a layer of hydroton on top to reduce the fungus gnats. Resovoir Seeds, Res uses coco and loves it. I just do a few in coco on the sidelines of the big game.
Peace

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AxisBoldasLove

I wouldnt use it by itself, i never do. I use it to germinate because it holds moisture very well. I use it as the first 3-4 inches of my buckets and the bottom is hydroton. I once tried to use it 70% coco and 30% mini rockwool cubes, and there is just not enough air. Even though i was using air pumps in my res i still ended up with minor root rot and did not explode thanx the the use of BBacteria.

Clone

i bought some cococoir the other day.. its pretty cheap, about the same cost as peat moss.

Whats a good mix to use? I was thinkin:
20% worm castings
50% coco
30% perlite

what do you think

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Flyfishfreak

Oh wtf man? I really loved this thread and then you wipe it clean? Boooooo

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slimm

I use 60/40 mix of coarse perlite and Canna coco. Canna is pre-washed. If you use another brand you may need to rinse it really well to remove the salt load. You may also need to supplement with Calcium since coco wants to hold CA until its buffering capacity is full. I have not grown in straight coco but I know a lot of growers who have great results with it. There can be a cation exchange problem with coco leading to lockout some lockout problem - once understood this is a pretty straight forward issue to accommodate for. Since I am growing in mixed media, I am told that the the cation exchange problem does not come into play so I do not have to worry about it unless I go with a higher percentage of coco in my mix.

It makes a nice complement to the perlite. Perlite provides plenty of air to the roots and the coco tends to hold the nutrient solution a little better. Together they work quite well for passive hydro.