Guilds for blueberry bushes

Last year we planted an orchard on our new homestead and are working on establishing fruit tree guilds around the trees.  The rows of trees alternate with rows of blueberries with sufficient space to move our chicken tractors between the rows.

I'd like to interplant/underpants the blueberries with plants that will be beneficial to them but am struggling to find advice- most is geared toward using blueberries as part of a guild or food forest, not toward creating a guild to benefit the blueberries.

Any advice would be greatly appreciated!

Welcome to Permies!

I do not have first hand experience doing what you are doing, I do have a link toward another post that shows some information about what works with blueberries. I think one of the challenges is the soil PH that blueberries thrive in.

https://permies.com/t/147945/Blueberry-guild-companion-plant-chart

I'll be curious to see what others have to say.

Haven't done it myself (no American blueberries yet, "just" a forest full of bilberries!) but one companion plant I've heard suggested for blueberries is northern bayberry (Myrica pensylvanica). It's a nitrogen fixer, and likes acidic conditions. The berries might not be directly useful to you (unless you want to make bayberry candles) but some birds seem to eat them, so maybe, just maybe, they'd be useful as chicken feed...