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Allegheny Chinquapin (Clement Rescues)
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The Allegheny chinquapin is the American chestnut's smaller cousin, and it has held on better. Castanea pumila is a native Appalachian nut tree that tops out around 20 feet instead of towering, and it carries a single shiny brown nut inside each spiny bur. The USDA NRCS plant guide says the nuts "have a sweet flavor and are often preferred over the fruit of the American chestnut."
Figure on a tree up to 20 feet tall and 6 to 20 feet wide, set 6 to 12 feet apart. Chinquapin is self-incompatible, so plan on at least two trees if you want nuts. Seedlings can set their first nuts in the second or third growing season, with crops picking up in the fourth or fifth year, and the harvest runs late summer into fall.
Its native range reaches into West Virginia, and it has gotten scarce. The NRCS lists chinquapin as rare across its range, threatened in Kentucky and extirpated from most of Alabama by chestnut blight. NC State Extension calls the species "moderately resistant to chestnut blight," which is part of why this small tree still matters to people working on chestnut recovery. Ships potted.
Hardy in zones 5–10.
Growing guide
Site and soil
Chinquapin wants sun and good drainage. Our record for this tree lists partial sun, and it will take part-day shade, but the USDA NRCS plant guide says the species is "not tolerant of coastal salt spray or shade," and the Forest Service adds that it "is not competitive where overstory trees begin to form a closed canopy." Treat partial shade as something it tolerates, and give it the sunniest edge you have if nuts are the goal.
Soil: coarse and medium textures, acidic, pH 4.5 to 6.6. The Forest Service notes chinquapin "grows well on almost all soil textures except heavy clay soils," and in the wild it sits on dry, rocky, sandy or loamy ground on ridges and slopes that are free from limestone. Drainage matters more here than fertility. Water needs are low once the tree is established.
Hardiness: our record lists USDA zones 5 through 10. The NRCS plant guide gives 6 to 10 for the species, so in zone 5 choose a sheltered spot out of hard winter wind. Chill requirement is about 400 to 600 hours, which this whole range covers easily.
Planting
Plant two or more. The Forest Service describes chinquapin as "monoecious, self-incompatible, and wind pollinated," so one tree on its own will flower and set nothing. Keep your trees in the same block rather than at opposite ends of the property, so pollen can actually carry between them.
Space them 6 to 12 feet apart. That is close planting for something that can spread 6 to 20 feet, and it suits a grove or hedgerow where the canopies knit together. Give each tree more room if you want it to stand alone as a specimen.
These ship potted, so there is no bare-root window to race. Set the tree at the same depth it is growing in the pot, water it in well, and mulch out toward the drip line while keeping mulch off the trunk itself. One siting note from the NRCS guide: the male flowers are strongly scented and the smell is not a pleasant one, so this is not the tree for right outside a porch window.
First-year care
Low water describes an established chinquapin, not a new one. Water deeply through the first growing season whenever the top few inches of soil go dry, then taper off as the roots take hold.
Keep competition down. Grass and weeds at the base cost a young chinquapin more than most people expect, and shade costs it more still. A clean mulch ring and an honest look at what is going to leaf out above it are the two best things you can do in year one.
Protect it from browse. The NRCS guide notes that white-tailed deer browse chinquapin foliage, and that squirrels, chipmunks, opossums, blue jays and woodpeckers all eat the nuts. A cage or tube for the first few years is cheap insurance.
Pruning
Very little is needed. The NRCS guide describes chinquapin as "a monoecious small tree or large shrub," so decide early which one you want. For a single-trunk tree, pick the strongest stem as the leader in the first few years and take competing stems off at the base. For a thicket-forming hedge, leave the multiple stems alone.
Do your cutting in late winter while the tree is dormant, and limit it to dead, damaged or crossing wood. If something sets the tree back hard, the species "resprouts vigorously following top-kill," so a browsed or broken chinquapin is usually not a lost one.
Harvest
Bloom is spring into early summer. The NRCS guide puts male flowers in May and June with female flowers later in the season, and the Forest Service gives April to July across the species' whole range.
Nuts follow from late summer into fall. The Forest Service reports ripe nuts available September through November. Each spiny bur holds a single nut, and NC State Extension measures the bur at 1 to 1.5 inches. Gather them as soon as the burs split open and show the nut inside, because if you wait you will be gathering behind the squirrels and the jays.
First nuts can come as early as the second or third growing season, but the Forest Service is clear that "nut crops are not large until the fourth or fifth year." A young pair of trees means a handful of nuts at first and a real harvest a few seasons on.
Sources
Growing specs
- USDA zones
- 5–10
- Growth rate
- Moderate
- Mature height
- up to 20 ft
- Mature spread
- 6 - 20ft
- Spacing
- 6–12 ft
- Sun
- Partial
- Soil
- Coarse and medium textures; pH 4.5–6.6
- Watering
- Low
- Bloom
- Spring
- Harvest
- Summer–Fall
- Wildlife
- Attracts pollinators, birds and wildlife
- Pollination
- Requires two trees