Goji Berry

Goji berry (aka boxberry, matrimony-vine)
lycium barbarum

Berries are edible when fully ripe.

Medicinal properties (for information only and not to substitute any professional advice):
https://pmc.ncbi.nlm.nih.gov/articles/PMC5758351/ 

Self-fertile.

Plants have an extensive root system and can be planted to stabilize sandy banks.

Very tolerant of pruning and can regrow from old wood.

Height at maturity: 5-8 ft, width: 4-8 ft
USDA zone 4
1-gallon pot