Goumi plants are well known in the Northwest permaculture community for being great nitrogen fixing shrubs with a much lower chance for spreading by birds. These shrubs can grow up to 12 feet or so but do well if pruned to stay lower for easy harvest.  They will fruit in sun or shade. The fruit is like a small oblong cherry with golden speckles and is great raw or cooked. Sweet Scarlet s a particularly delicious variety. Last year, our plants in sun were more productive but the birds got to them quicker so we got more fruit from the shaded plants.