Best Cover Crop? for any season - with a catch
With some more recent rescues and an increase in number in a particular species, combined with some new notions on amending the formal garden here... I'd like to know what the best cover-crops are for TN?
Not only am I seeking a (cheap) cover crop for any or all seasons (not just for winter), but ideally I need one that would be healthy grazing for domestic rabbits.
The garden soil needs amending, period. Chances are I will only use a small portion of the formal garden for veggies this year (those that would be more hassle to try and grow in a container, like corn, etc.). I would like to sow a cover crop or crops, in other sections that the rabbits can safely graze on, before time to till under - and then move the rabbits' grazing pen to the next section of cover crop.
I know buckwheat is a common cover crop to be grown and tilled under before it goes to seed, I'm just not sure if it would be good grazing for bunnies so I have to check into that. Does anyone have any other recommendations?
With the exception of small parts being used for some veggies, I'd like to do cover crops and rotation of that grazing area for the rabbits throughout the year - so I need suggestions for things suitable for all of the seasons, not just the winter. Spring, Summer, Fall, and Winter all. If you don't know if they would be good or safe for bunnies, suggest anyway and I'll double-check against rabbit-specific info or sources to find out.
Figure if anyone would know, you folks here would!