Cherry Elaeagnus — Elaeagnus multiflora
by Scott Smith
The perfect solution for my black walnut “problem.”
Here is the description from Oikos Tree Crops (emphasis mine):
Gumi was introduced from China into the US over a hundred years yet this species has never really caught on as a edible fruit plant until recently where analysis of the fruits reveal numerous healthful compounds. Unlike the autumn olive this species has larger fruit up to 1/2 inch in diameter. Fully ripe fruits are juicy and are good enough to eat fresh. According to Michael Dirr in “Dirrs Hardy Trees and Shrubs” goumi “does not produce the stray seedlings” like Autumn olive. Useful for pies, jellies and juice. Free of insects and disease. Nitrogen fixing. Can grow under black walnuts.
Height to 10 ft.- 6 ft. wide. Zone 5 hardiness. Hardiness -20 °F.
And from another website (emphasis mine):
Bloomtime Range: Late Spring to Late Spring
USDA Hardiness Zone: 5 to 7
AHS Heat Zone: Not defined for this plant
Light Range: Part Sun to Full Sun
pH Range: 4.5 to 7.5
Soil Range: Mostly Sand to Some Clay
Water Range: Semi-Arid to Moist
Black walnuts, check. Sandy soil, checkaroo. And at 10′ x 6′ I can probably plant three of them.