|Doesn't look like much.|
Another attribute of this plant is that it thrives in light shade. I have seen solid colonies beneath Black Locust and Silver Maples.
A final point is that harvesters are going to walk all over these plants when picking fruit. They will likely damage a great number of growing points. The plants will not care. They will fill back in in the spring.
This approach to planting between the trees is Darwinian. I don't care if any one species or any give individual fails as long as something more useful than nettles or motherswort fills the ecological niche.