There is a lot of mention in organic gardening of cover crops to add back to the soil, either used in fallow cycles or between rows or under taller plants for weed control. The few indoor no/low till show the planting and mulching etc, but not where or what to purchase for the small container grower.
This year Botanical Interests release a new series of seeds called 'Cover Crop'
Sweet Lorane Improved Fava Bean Cover Crop Seeds
Soil Builder Peas/Oats Cover Crop Seeds
Crimson Clover Cover Crop Seeds
Common Buckwheat Cover Crop Seeds
My grow log mentioned the buckwheat being used in my tubs this round. I've used their cat grass (oats) seeds before, the other brand had an invader seed, and like the way it roots quickly and makes the soil nice and spongy.
The buckwheat seems to have a long fleshy stalk, so far working on leaf set 2. I've cut a few down as they were too tall and floppy. Reading the peas/oats package it mentions the oats providing a support for the peas to climb. The cat grass with seedlings also help support until ready for transplant.
Will do a test patch with the combo or wait until setting up the bloom size containers in a few weeks. The package says maturity in 56 days, well before the girls will finish and probably will be in full shade by then anyway.
Other products from them planted are chives and cilantro. Both (according to the package) are said to repel spider mites. Does it work? Along with a regular IPM program sure... why not...
They are all BEE friendly