Strawberry Companions

I looked up companion plants for strawberries, and found quite a few.

bush beans
spinach
lettuce
onions
thyme
comfrey
borage

Comfrey keeps surrounding soil rich and moist. Rotted leaves and roots mixed with water makes good fertilizer. Improves size and flavor of strawberries if planted nearby.

Borage and strawberries help each other improves the soil nutrition for the strawberries and enhances the fruits flavor and yield.

Some are not going to work in the pots - bush beans and onions are out because of their size, spinach or lettuce would probably work, but Comfrey or Borage seem to offer the most benefit. Out of those two Comfrey does not seem to be a popular plant in the US, so I think I will have the most luck finding a Borage plant.