Justin, All the horticultural sages I've talked with about this concept say it is a wasted effort in containers. My experience has been the same-- it may not hurt anything but is unnecessary. Maybe in the garden or in raised beds it can be purposeful, but not pots. For the plants you mention I suggest a sandy mix with some drainage material (perlite or, better, pumice) and a small proportion of organic material, all mixed uniformly. Dylan