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Foraging around Boston
AI field guide · refreshed weeklyEarly Fall Foraging in Greater Boston: September
In season now
Black Walnut
Where: Scattered throughout Boston area, parks, old homesteads, street trees; common in Dedham, Newton, suburbs.
Green husks (now turning black) contain the nut; harvest when husk yellows and falls, crack open to extract dark, oily kernel. Wear gloves—the husk stains permanently.
Look-alikes: Butternut (Juglans cinerea) has a more elongated, sticky nut and is much rarer; black walnut is far more common in the Boston area.
Caution: Extremely bitter tannins in the husk; wear gloves and work outdoors. Toxic to horses and some plants.
Wild Grapes
Where: Vines climbing trees and fences throughout Boston parks, along the Charles River, Emerald Necklace, and suburban woodlots.
Dark purple or black clusters; taste for sweetness before harvesting—ripe grapes are sweet and come off easily. Eat fresh or ferment.
Look-alikes: Pokeweed berries (dark purple, in drooping clusters) are toxic; grape clusters are tighter and grapes roll off the stem easily, while pokeweed berries cling.
Caution: Confirm you have grapes, not pokeweed. Avoid private property; many vines are on residential fences.
Autumn Olive (Elaeagnus umbellata)
Where: Invasive shrub, common in disturbed areas, roadsides, and field edges around Boston suburbs; Stow, Concord, Lincoln.
Small red berries speckled with silver; tart and astringent raw, better cooked into jam or syrup. High in lycopene.
Look-alikes: None dangerous, but easily confused with native silverberry (rare in MA); autumn olive is much more common and berries are smaller and more numerous.
Caution: Thorny branches; wear gloves. Invasive species—harvesting helps control it.
Highbush Blueberry (Vaccinium corymbosum)
Where: Wetland edges, acidic woodlands, and cultivated areas throughout greater Boston; Walden Pond area, Middlesex Fells.
Blue-black berries, waxy bloom; eat fresh or freeze. Peak harvest is late August to early September; some berries may remain.
Look-alikes: Pokeweed berries (glossy, no bloom, in drooping clusters) are toxic; blueberries are dull with a white waxy coating and grow in tight clusters.
Caution: Confirm blueberry, not pokeweed. Check for ticks while harvesting in tall vegetation.
Wild Mint (Mentha arvensis, M. spicata)
Where: Moist disturbed areas, stream banks, ditches throughout Boston; Charles River banks, wetland margins.
Aromatic leaves; crush to confirm minty smell. Harvest upper stems and leaves for tea, pesto, or fresh use. Dry for winter storage.
Look-alikes: Catnip (Nepeta cataria) and other Lamiaceae have similar leaves but lack true mint aroma; crush a leaf to confirm.
Caution: Mint spreads aggressively; harvest freely. Avoid areas sprayed with herbicides.
Jewelweed (Impatiens capensis)
Where: Moist, shaded areas, stream banks, and ditches throughout Boston; Walden Pond, Middlesex Fells, Charles River wetlands.
Succulent stems with translucent, water-filled tissue; crush fresh stems and apply juice to poison ivy or minor skin irritation. Use immediately.
Look-alikes: None dangerous, but easily overlooked; look for orange flowers and translucent stems in wet shade.
Caution: Grows in tick-prone areas; check yourself after harvesting. Poison ivy often grows nearby—learn to identify and avoid it.
Coming soon
Acorns (White Oak, Red Oak)
White oak acorns (lower tannin) ripen now; red oak acorns mature in October. Leach with water to remove bitterness, then grind into flour.
Wild Mushrooms (Hen of the Woods, Oyster)
Peak season begins in October; cool, wet weather triggers fruiting. Learn species identification carefully or forage with an expert.
Persimmons (American, Diospyros virginiana)
Ripen after first frost in November; soft, sweet fruit. Rare but present in southern Boston suburbs; check old homesteads.
Safety in this area
- Tick alert: Early fall is peak season for deer ticks (Ixodes scapularis) in Massachusetts woodlands and tall grass. Wear light-colored long sleeves and pants, tuck pants into socks, and check yourself thoroughly after foraging. Ticks can carry Lyme disease and other pathogens.
- Poison ivy (Toxicodendron radicans) is common throughout the Boston area in woodlands, wetlands, and disturbed areas. Learn to identify 'leaves of three'—all parts are toxic year-round. Avoid touching, and wash immediately if exposed.
- Giant hogweed (Heracleum mantegazzianum) is present in parts of greater Boston, especially along waterways. Sap causes severe phytophotodermatitis (blistering) in sunlight. Wear protective gear and never touch.
- Private land: Most foraging land around Boston is private. Always ask permission before entering. Public lands include Walden Pond, Middlesex Fells, and Emerald Necklace parks; check local regulations.
Foraging information is educational. Confirm every identification with a regional field guide or expert before eating anything wild.
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