i am also in zone 5, this is my list of fav perennial foods, most from
experience, some from reports or nutritional analysis. some are hardy to zone 6, but placed in the right spot should do fine.
Giant filbert (Corylus maxima)
Carmine goumi
Currant white versailles
Titania black currant
Invicta gooseberry
Indigo gem haskap (blue moose as pollinator)(aurora as pollinator?)
Vdb fig
Caucasian caper (Capparis herbacea)(hardiness?)
Blackberry 'ebony king'
Raspberry ‘caroline’
Chinese yam (Dioscorea batatas)
Caucasian spinach
Seedless concord grape (V. labrusca)
Supreme muscadine (with protection the first 3 years)
Kiwiberry issai
Kiwiberry kens red
Watercress (Ontario)
Ostrich fern (Ontario)
Udo ‘sun king’
Wild leeks (Ontario)
Spring beauty (Claytonia virginica)
Walking onion
Kernza?
Silphium integrifolium? (perennial oilseed)
Hostas (edible ground cover around trees) yuki urui
Comfrey (bocking 14 is sterile)(good pig food)
Stingless
nettle (Urtica galeopsifolia)(harmful to kidneys if harvested after flowering)
Basil mint (tires)
Fennel (tires)
Oregano (tires)
Tarragon (tires)
Thyme (tires)
Horseradish
Scallions (tires)
Myoga ginger
Asparagus (
staple)(variety?)
Maidens tears (Silene vulgaris)(Ontario)
Perennial arugula (Diplotaxis tenuifolia)(staple)
Turkish broccoli (Bunias orientalis)(staple)
Kaleidoscope kale (staple)
Spadona chicory (oxalates)
Blonde
de Lyon Sorrel (oxalates)
Strawberry mara de bois,
cabot)
Blueberry (bluecrop)
Opuntia humifusa (staple) (tires)
Physalis subglabrata (tires)
Peach (reliance,
calanda
harko nectarine)
Cherry (black tartarian,
sato nishiki)
Pawpaw susquehanna
Nikita's
gift hybrid persimmon
Canadian white blenheim apricot
Superspur aestivalis mayhaw
Jujube coco
Apple (komitsu,
cox orange pippin,
granny smith,
roxbury,
Antonovka
pitmaston,
winesap,
arkansas black,
cinnamon spice)
Best golden russet bosc pear
Hosui nashi
Sweet lavender mulberry
Plum (Graf althans,
Mirabelle)
Trifoliate orange
Japanese heartnut (Juglans ailantifolia)
Carpathian walnut
Almond oracle (late bloom)(3)
Ultra northern pecan deerstand
Chinquapin nut (2)(nsf)
Pinus edulis (most commercial american species, 25mm, good cooked)
Yellowhorn (oil)
Chinese toon (Toona sinensis)
Sugar maple (10)(Ontario)
Emperor oak
English oak (Quercus robur)(black truffle tree)(10 trees)
Camellia japonica
Tea bush (sochi)
Jelly vine (Cocculus orbiculatus)
Salavatski pomegranate
Tonda di giffoni hazelnut
Noir de spain black mulberry
Uzbek pistachio
Musa basjoo (hardy banana)
Dolnamul (Sedum sarmentosum)
Bangpung (Peucedanum japonicum)
Monkey puzzle tree (need male/female trees)
Eia popeia passionfruit
Phyllostachys nidularia (most delicate flavored, best species to eat raw)
Montmorency sour cherry
Chestnut marrone di marradi
Grape (somerset,
Neptune seedless,
ruby roman
corinth
Acer saccharinum (silver maple)(edamame like seed)
Calycanthus floridus (cinnamon alternative)(toxic)
Caragana arborescens (Siberian peashrub)(Ontario)
Chaenomeles japonica (japanese quince)
Hovenia dulcis (japanese raisin tree)
Lindera benzoin (spicebush)(Ontario)
Maclura tricuspidata ‘norris’ (che)(can graft on osage orange)
Myrica pensylvanica (wax myrtle)(bay leaf substitute)
Zanthoxylum piperitum (japanese pepper)(the best zone 5 pepper)