soil mix for grow bags

[bukujutsu]

I'm gonna grow 3 hindu kush plants(indica) in grow bags.
I'm planning on using a soil less mix with an organic nute mix.
I tried to find promix, but couldn't find any.
Any other suggestions?
I'm using recipe #1 from here: International Cannagraphic Magazine Forums - Organics for Beginners (http://tinyurl.com/ywayck)

[latewood]

grow bags were invented to be used with coco. However, many commercial growers use perlite.

[bukujutsu]

Just coco coir with nothing else except the fertilizer mix?
I live in Los Angeles and it gets pretty hot, think this could cause a problem?

[bukujutsu]

Alright, I found a great hydro shop.
They have bales of coir for a good price as well as many other products.
The grow bags will be outside in direct sunlight.
Should I mix the coir with perlite or vermiculite?
I'm planning on mixing in an organic fertilizer solution.