Green Manure for Onions

[DavidW]

I’m looking to prepare my onion bed for next year (same bed as this year). It’s difficult to get horse manure, so I thought I could prepare the bed using green manure.  I would need something that I could put in after my present onions are dug up and something that would give the right type of feed for the onions-any ideas from anyone.

PS :I know I’m planning early

Thanks
David

[DavidW]

[redimp]

They are meant to like growing through clover but don't know how all the nitrogen would effect bulking up.