5:1:1 for SWC?
I purchased SWC troughs and self-watering container mixes from Gardeners.com. They fit my balcony perfectly (literally there is less than half an inch to spare!) so I am plan to order another set of troughs tomorrow. I am wondering if I should buy more mixes or whether I should use 5:1:1 or gritty mix. I plan to get the ingredients for 5:1:1 to repot other containers I have anyway, so I have to figure out whether I order the medium too.
Has anyone used 5:1:1 and/or Al's gritty mix in SWC? Would you recommend one or both for SWC?
Or could I add pine bark fines to the container mixes I have? If so, what proportion should I use? Would it be 5 parts bark fines, 1 part self watering mix?
Also, has anyone used the organic self watering mix from Garderner's Supply? Is it worth the extra expense?