Gymgirl wrote: Here's a picture of the PBFs I use in the container mix, after I've sifted it. The PB for his 5:1:1 container mix (PBF:peat:perlite) should ideally be from dust size to no more than nickel-size. It almost looks just like the MG potting mix, but without the moisture retaining, "spongey-ness" to it.
I use a 1/2" wire screen to sift out the chunky pieces for my containers. Most of the sifted bark is from dust to slices averaging the size of a nickel.
Per Al's recommendation, I customized his 5:1:1 container mix recipe to a 3:1:1 for my eBuckets, and self-watering containers, to increase the peat to PB ratio for more of a "wicking" action from the peat. The self-watering containers have the built in reservoirs in the containers. (His 5:1:1 recipe is design for use in free draining containers.) I use Miracle Grow (MG) potting mix as my peat component, per Al's suggestion (and because I already had loads of it on hand), but you can go with sphagnum peat as well. I can also go with a 4:1:1 mix, depending on how good my "wicking" action works.