Pecan

Carya illinoinensis

Family Juglandaceae

TreeNativeZones 6-9

Botanical illustration of Pecan

Buttery, paper-shell pecans falling in your own October — that's the promise of the pecan, America's great native nut tree. Store-bought halves can't match a nut cracked the week it dropped, and one mature tree can bury a family in them on a good year.

This is legacy planting: a true 70-100 ft shade tree that outlives its planter and cools the whole yard along the way. Give it room, give it a partner cultivar for pollination, and let your grandchildren argue over the pie.

☤ Allelopathic — suppresses neighborsPecan releases juglone, an allelopathic toxin from the walnut family. It can stunt juglone-sensitive plants — tomatoes, potatoes, peppers, blueberries, apples, azaleas, and rhododendrons among them — within roughly 30–50 ft of a mature tree. Grow only juglone-tolerant species beneath it, and keep the sensitive ones well clear.

Where to buy pecan — 5 nurseries compared

  • Full Sun
  • High water
  • Slow-Moderate growth
  • Native to North America
  • Excellent edible
  • Needs a pollination partner
Pecan — a print from the Plant Library collection

From the print shop

Growing pecan? Hang it.

Our Plant Library collection carries pecan — Carya illinoinensis, print Nº 357, “Pecan.”

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Will it fruit where you are?

Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what pecan actually needs.

Hardy inZones 6-9
PollinationPartner needed

Pecan · Common problems

Common pecan problems

Pests, diseases and weather to keep an eye on.

Pests

5 problems on file

Diseases

2 problems on file

Pollination

Poor pollination → low fruit set (plant a partner)

Pecan · Growing & propagation

Growing pecan

Light, water, soil, propagation and the season’s jobs.
What it needsThe details
Light
Full Sun
Water
High young

Taproot finds water later. Nut fill needs late-summer water

Soil
Deep, Rich, Well-drained alluvial · pH 6.0 - 7.0
Fertilizer
Nitrogen + ZINC (pecans crave zinc, foliar spray if new growth is mottled/rosetted).
Pruning
Late Winter

Central leader when young. Little needed after training.

Spacing
35-50 ft

How to plant & propagate pecan

Propagate
Grafted, or from cuttings/layering

Seed won't come true

Pecan · Harvest & keeping

What you get from pecan

How long before it bears, how much it gives, how you know it is ready, and how long it keeps once picked.
Botanical illustration of Pecan
Years to first harvest
3 to 10 years
Typical yield
40–50 lbs per tree
What you eat
Nuts
How to tell it is ready
Harvest after shucks split and nuts drop

Dry nuts before storage

How long it keeps
Months cool and dry after drying

Pecan · Seasonal care & spray guidance

The pecan growing playbook

Field-tested instructions for every job pecan asks of you, compiled from university extension guidance — in the order the season brings them.

When to spray pecan

Growing season. Realistically none for home growers — cultivar resistance does the work. 'Kanza' is scab-proof for the north.

While it is dormant

winter, before growth starts

1 job
PruningIn winter

Dormant pruning: train a central leader, cut out narrow crotches

While the tree is leafless, train young trees to a single central leader and keep the lowest scaffold limbs at about 6 feet - head high or a little above - so you can walk and mow under the tree for the rest of its life. Remove branches with crotch angles narrower than 60 degrees now, while they are small. Mature pecans are not routinely pruned - thin crowded limbs and take out damaged wood only. Narrow crotch angles trap included bark and never form a real wood union, so they split out of the tree decades later under wind and a heavy nut load. Pecans get very large, and a crotch you ignore at year three is a crane job at year thirty.

As growth begins

early spring

3 jobs
FeedingIn March and April

Feed pecan by soil test

Apply nitrogen and zinc only as needed from soil or leaf tests, keeping fertilizer away from the trunk. Pecans have high nutrient demand, but overfeeding wastes money and can worsen disease or weak growth.

FeedingAt green tip

Foliar zinc: first spray at budbreak, then twice more

Starting at budbreak, spray the new growth with zinc sulfate at 2 to 3 pounds per 100 gallons of water. Repeat for three sprays total at 2 to 3 week intervals while shoots are still expanding. Young and fast-growing trees need this most. Pecans are heavy zinc users, and zinc is immobile in the tree - it only enters the leaves that are actively expanding when you spray. Miss that window and the shoots rosette with short internodes and small crinkled leaflets, and the deficiency cannot be corrected later in the season.

SprayingAt green tip

Phylloxera: spray at budbreak, before shoots reach one inch

If this tree had galls on leaves or twigs last year, spray imidacloprid or carbaryl at budbreak and again 7 to 10 days later. The window closes once new green growth passes about one inch. Phylloxera nymphs hatch at budbreak and feed on the tender shoot, and that feeding is what makes the tissue swell into a gall. Once the gall closes around the insect it is sealed inside where no spray can reach it, so a treatment applied after galls appear does nothing.

Just after bloom

as the fruit sets

2 jobs
WateringAt shuck split

Keep water on the tree through shuck split

Do not back off watering once the kernels finish filling. Keep the soil moist through nut maturity and shuck split, easing off only about a week before you plan to shake the tree. Shuck dehiscence - the shuck actually opening to release the nut - is a process that requires adequate water. A tree carrying a heavy crop on dry soil gets shuck decline instead, which delays or prevents the split and opens the nuts to anthracnose. Stick-tights that never release are the usual result.

SprayingAfter fruit set

Pecan scab: cover sprays through nut sizing until the shell hardens

On a scab-susceptible cultivar, spray boscalid plus pyraclostrobin or phosphorous acid once the nuts begin sizing, and repeat every 2 to 3 weeks depending on how often it rains. Continue through shell hardening. Rotate between FRAC groups rather than repeating one product. On a resistant cultivar like Elliott, Excel, or Kanza you may need no sprays at all. Scab only infects tissue that is still actively growing, and it needs free moisture from rain or heavy fog to germinate. That is why the spray has to be on the nut before the rain arrives, not after - and why rainy stretches during nut sizing shorten the interval.

Through summer

the growing season

1 job
What to watch forIn May and June

Scout pecans for nut casebearer

Check small nut clusters for tiny white eggs or entry damage near late May and early June. Pecan nut casebearer larvae can destroy nutlets before the crop sizes up.

Harvest time

as it ripens, and picking

1 job
SprayingBefore harvest

Pecan weevil: trunk sprays once the shell hardens and weevils emerge

After the shells harden and the kernels reach the gel to dough stage, watch for emerging weevils, especially in the days after a soaking rain. When they appear, spray carbaryl or bifenthrin over the lower 8 feet of the trunk and the ground beneath it, and repeat two to four more times at 7 to 10 day intervals until emergence stops. A 12 to 18 inch band of cloth smeared with Tanglefoot around the trunk also traps climbing adults. The female weevil cannot lay eggs in a nut until the kernel has gelled, so she waits underground and emerges when rain softens the soil enough to dig out. Timing to that emergence, not to a date, is the whole game - in a dry year they may not emerge at all.

After harvest

autumn, and putting it to bed

1 job
ProtectionAfter harvest

Scab sanitation: rake and destroy fallen shucks and leaves before buds swell

After harvest and before the buds begin to swell in spring, rake up and destroy every fallen leaf, shuck, and leftover nut under the tree. Do not compost them in place under the canopy. Prune out damaged twigs while you are there. The scab fungus overwinters in last year's fallen leaves, shucks, and nuts, and those are the primary source of the spores that infect new growth in spring. Clearing the litter removes the inoculum before it can be splashed back up into the canopy.

Pecan · Calculators & field guides

A little help in the garden.

Calculators for the figures. Field guides for the hands-on work.

Pecan · Yearly calendar

The pecan year, month by month

What pecan asks for, month by month.

Jan

No calendar activity is listed for this month.

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Bloom
Prune
Harvest

BloomMarch to May

PruneFebruary to March

HarvestOctober to November

What each band means

  • Bloom — flowers open — pollinators working, frost on blossoms is the danger.
  • Prune — shape it now — cuts heal cleanly and structure is visible.
  • Harvest — picking time — check ripeness every few days.

These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.

Pecan · Ecology & uses

Ecology & uses

What it does for the garden, and what it is grown for.
Botanical illustration of Pecan

Carya illinoinensis

Pecan in the garden system

  • Canopy layer tree
  • Keystone: Keystone — hosts 230+ caterpillar species
Attracts
Birds
Moisture
Facultative / average
Deer
Browsed

Protect young plants

Origin
Native to North America
Allelopathy
Pecan releases juglone, an allelopathic toxin from the walnut family. It can stunt juglone-sensitive plants

Tomatoes, potatoes, peppers, blueberries, apples, azaleas, and rhododendrons among them — within roughly 30–50 ft of a mature tree. Grow only juglone-tolerant species beneath it, and keep the sensitive ones well clear.

What pecan is grown for

✓ Commonly eatentree-nut allergen

Use
Nuts
Use
Shade
Use
Legacy
Edible value
4/5

Harvesting & storing pecan

October - November.

Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.

Pecan · Varieties & cultivars

Best pecan varieties & cultivars

There are far more than these — the ones below are the named varieties of pecan people actually plant.

Named varieties of pecan differ in winter-chill needs, ripening time, hardiness, and whether they set fruit on their own — pick one that fits your climate.

12 varieties

Kanza

Partly self-fertile

Ripens
Late September to October
Zones
6-9
Disease
Excellent scab resistance (rated 1 of 4 in UGA trials)
Size
74 nuts per pound, 52% kernel
Pollination
Type II (protogynous)

Small nut, clean golden halves, high kernel quality — A Major x Shoshoni cross released by USDA. Superior cold hardiness makes it the pick for the northern end of pecan country, and UGA recommends it as an Elliott replacement. Earliest harvest of the resistant cultivars, around September 20 in Georgia.

Where to buy ‘Kanza’

Story Thyme Farms may earn a small commission from these links, at no cost to you — it never changes what we recommend.

EtsyBrowse growers↗

Sources & plant identity

Know what you’re growing.
See where the knowledge comes from.

Botanical illustration of Pecan

Pecan

Carya illinoinensis

The plant, at a glance.

Botanical name
Carya illinoinensis
Plant family
Juglandaceae
Growth habit
Tree · Perennial
Origin
Native to North America
USDA plant symbol
CAIL2
Invasive risk
Low
Every garden is different.

Hardiness, size and timing vary with your cultivar, soil and climate.

Rooted in research.

University extension research, brought together with hands-on growing experience at Story Thyme Farms.

Explore Pecan’s sources17 reference links
for Pecan

Research from these sources

Clemson UniversityLSU AgCenterMississippi State UniversityNC State ExtensionNew Mexico State UniversityNoble Research InstituteOklahoma State UniversityUniversity of ArizonaUniversity of Georgia

Publisher marks identify sources, not sponsorship or endorsement.

Questions

Pecan questions, answered straight.

Why isn't my pecan fruiting?

Most often: it has no genetically distinct partner nearby. Pecan can't pollinate itself — wind-pollinated. Plant a second, unrelated one nearby; two different cultivars, or a cultivar plus a seedling, is the classic pairing.

Is pecan safe for kids and pets?

Pecan is commonly eaten and isn't considered toxic, but "commonly eaten" isn't a guarantee for any particular person or animal — allergies, quantity, and which part you eat all matter. One caveat on this one: tree-nut allergen. Never eat a plant you haven't positively identified, and check with a vet before letting pets or livestock graze anything new.

When do you harvest pecan?

October - November.

How do you propagate pecan?

Grafted, or from cuttings/layering (seed won't come true).

Elsewhere

Where pecan sits in the library.

Where pecan sits in the library

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