One of my favorite permaculture shrubs is Goumi, Elaeagnus multiflora. This multifunctional plant is easy to grow! The fragrant tiny yellow flowers bloom in April, followed by astringent and sweet fruit by the end of June. In 2018 I ordered plants from One Green World and they recommend planting two varieties, so I planted two Sweet Scarlet and two Red Gem. The former is more robust with dense foliage that hides the fruit from the birds whereas Red Gem has a more open framework, with less foliage and is more productive. If you have limited space and prefer to cook the fruit with a sweetener, then Red Gem is a winner. I mostly eat the fruit raw and share the crop with birds. For the sweetest flavor wait until the fruit is a deeper red.
The genus Elaeagnus is recognized for having a symbiotic bacteria, Frankia that grows in the soil and fixes nitrogen from the air, making it available to the plant. I prune Sweet Scarlet several times a season and use the leafing branches as compost.
Goumi, an Asian native has been cultivated here for at least one hundred years. In Japan it is known as natsugumi. The fruits of this shrub are high in lycopene I wrote a more thorough account here


