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McMillan Pecan (Carya illinoinensis ‘McMillan’) is a large Auburn University-bred pecan selected for low-input production in the humid Southeast, bearing nuts with rich, sweet kernels at 50% ratio and strong yield productivity that outpaced many peers in early Georgia trials. It grows in USDA hardiness zones 6-9 and AHS heat zones 6-10, and needs 300-900 chill hours, and requires cross-pollination with a compatible variety such as Caddo Pecan or Cape Fear Pecan for reliable nut set.
3-4′ Bare Root Grafted Tree Rootstock: Pecan Seedling
Pecan Seedling (Standard): Grafted onto a pecan seedling, so the tree reaches its full natural size on a deep taproot. No dwarfing effect.
• Support: Freestanding; the deep taproot gives excellent anchorage.
McMillan originated in the Auburn University pecan breeding program in Alabama and was selected specifically for low-input production under humid southeastern conditions. Trial records at the University of Georgia’s Tifton campus show McMillan was planted in 2002 and bore its first crop in 2005; early yield data ranked it among the most productive precocious selections in multi-year trials, with initial yields documented at roughly double those of Desirable — the Southeast’s longtime commercial benchmark. Auburn University championed the cultivar early, recommending it for Alabama growers seeking consistent production without intensive spray programs. Its parentage has not been formally published, but its performance profile — mid-size nut, heavy and early bearing habit, warm-climate adaptation, and consistent scab resistance on unsprayed trees — fits the Auburn program’s objectives of developing cultivars viable under lower-input management in the humid South. McMillan is protogynous (Type II), with early pistil receptivity and mid-to-late pollen shed.
McMillan thrives in deep, well-drained loamy soils with a pH between 5.5 and 7.0 and performs best across USDA Zones 7 to 9, where long warm summers allow the nut to fill fully before fall harvest. Like all pecans, it is a large canopy tree — expect 70 to 100 feet tall and 40 to 75 feet wide at maturity — so site selection and spacing of at least 40 feet between trees is essential from the start.
Foliar zinc is the single most critical nutritional input: zinc deficiency (rosette) stunts new growth and reduces yields significantly, and pecan roots in many soils cannot absorb adequate zinc even when it is present. Begin spraying zinc sulfate or zinc-EDTA at budbreak and repeat two to three times at two- to three-week intervals through early summer. Consistent watering during nut fill in August and September supports kernel development and reduces blank nuts. Deep annual mulching conserves moisture and builds the organic matter that sustains long-term soil health in large tree plantings.
USDA Hardiness Zone: 6-9 AHS Heat Zone: 6-10 Chill Hours: 300-900 Sun Requirements: Full Sun Soil pH: 5.5-7.0 Soil Type: Deep, fertile sandy loam to clay loam; native to bottomland alluvial soils Soil Drainage: Well-drained to moderately well-drained Water Requirements: Medium Drought Tolerance: Moderate Plant Spacing: 60-80 ft apart Container Suitability: Not suitable; requires deep soil for taproot
McMillan develops a broad, upright-spreading canopy characteristic of improved southeastern pecans, reaching 70 to 100 feet tall with a crown spread of 40 to 75 feet over several decades. Growth rate is moderate — faster than many older heirlooms but manageable with thoughtful spacing. The tree is deciduous, leafing out relatively late in spring, which reduces late-frost risk to the emerging catkins.
Foliage is large-leafed and lush when nutrition is adequate, providing deep summer shade that benefits food forest understory plantings. The bark develops attractive gray-brown furrows with age. AHS Heat Zone tolerance spans 3 to 9, confirming adaptability across a wide summer-heat range. Salt tolerance is low and wind tolerance is low, so sheltered inland sites with good air drainage are preferable to exposed coastal plantings. Wildlife value is strong: squirrels, wild turkeys, white-tailed deer, woodpeckers, crows, raccoons, and opossums all utilize the mast crop heavily.
Mature Height: 70-100 ft tall Mature Spread: 40-75 ft wide Growth Habit: Large deciduous tree; broad, rounded canopy; vigorous upright growth Growth Rate: Moderate Foliage Type: Deciduous Food Forest Layer: Canopy Permaculture Role: Canopy/overstory tree; nut crop; wildlife habitat; mast provider; shade Fall Foliage Color: Yellow to golden yellow Thorns?: No Attracts Wildlife: Squirrels, white-tailed deer, wild turkey, crows, woodpeckers, songbirds, opossums, raccoons Life Span: 150-300+ years
McMillan is a Type II (protogynous) pecan, meaning it has receptive female flowers before its own catkins shed pollen. In the current pecan pollination chart, its pollen-shed window is May 3 - May 15 and its receptive window is May 4 - May 12. Reliable crops need a compatible cross-pollinizer whose pollen shed overlaps that receptive window. Best matches from the current article matrix: Cape Fear (Type I), Caddo (Type I), Oconee (Type I). Pecans are wind-pollinated; plant compatible varieties in the same yard, food forest, or orchard block with open airflow rather than relying on an unknown tree several properties away.
Bloom Season: Late Bloom Window: Pollen shed: May 3 - May 15; receptive: May 4 - May 12 Pollination Requirements: Cross-pollination required; Type II (protogynous): becomes receptive first, then sheds pollen later; needs a compatible cross-pollinizer whose pollen shed overlaps its receptive window Pollination Mechanism: Wind-pollinated Flower Color: Yellow-green (catkins); inconspicuous
McMillan nuts average approximately 56 per pound — medium-large for a warm-climate variety — with a kernel ratio of roughly 50 to 51 percent. The shell is thicker than some modern selections, but the kernel fills more completely than Stuart and rarely exhibits the papery packing material that clings to Stuart's kernel. Nut quality is rated average to good; kernel color is slightly darker than the palest premium selections, though this has no bearing on flavor or nutrition.
Harvest falls around October 20 in central Georgia, placing it in the mid-to-late season window. Kernels are suitable for fresh eating, baking, and confectionery use. Whole unshelled nuts store well in cool, dry conditions for months; shelled kernels maintain quality in the freezer for up to a year. The generous wildlife mast production adds ecological value beyond the human harvest.
Ripening Season: Very Late Harvest Window: Mid Oct - Early Nov Fruit Weight: 56 nuts per pound (medium-sized nut, roughly 8 g per nut) Flavor: Rich, sweet pecan flavor; typical of southern mid-season pecans Fruit Color: Light tan shell; kernel is beige to dark beige Fruit Texture: Thick shell; fills better than Stuart; 50% kernel ratio Bearing Habit: Annual bearer; highly consistent Years to Bear: 5-7 years (grafted trees) Culinary Uses: Fresh eating (raw/roasted), pecan pie, pralines, candies, baked goods, ice cream, salads, cooking oil
Moderate resistance to pecan scab (Venturia effusa) is one of McMillan's defining characteristics — performing well in most years with minimal intervention but showing some lesions during unusually wet seasons. University of Georgia researchers classify this as "good" resistance suitable for low-spray and low-input programs, making McMillan a reasonable choice for growers pursuing reduced-spray management. Downy spot (Mycosphaerella caryigena), vein spot (Gnomonia nerviseda), zonate leaf spot (Cristulariella moricola), and powdery mildew (Microsphaera penicillata) round out the key disease concerns; maintaining adequate tree spacing for canopy airflow is the primary cultural defense against all foliar diseases.
Among insect pests, pecan weevil (Curculio caryae) and pecan nut casebearer (Acrobasis nuxvorella) pose the greatest direct nut-quality threat. Cultural management includes prompt removal of shuck debris, which disrupts overwintering weevil populations, and pheromone trapping to time interventions accurately. Kaolin clay (Surround WP) applied during nut sizing deters weevil feeding and casebearer oviposition without synthetic inputs. Hickory shuckworm (Cydia caryana) and black pecan aphid (Melanocallis caryaefoliae) are secondary pressures; beneficial insect habitat around the orchard edge supports natural aphid control.
Start foliar zinc early: Spray zinc sulfate at budbreak, repeat twice at three-week intervals — skipped applications cost more yield than any other input.
Plant a Type I companion: Amling or Gafford within 150 feet; without overlapping pollen shed, crops are light regardless of tree health.
Scout casebearer early: Check for first-generation larvae at pencil-eraser nut size and apply Surround WP before entry-stage damage occurs.
Deep-water in August–September: Slow, deep irrigation during nut fill supports the 50-percent kernel ratio McMillan can deliver.
We ship in late winter or early spring based on your USDA hardiness zone.
We strive to ship orders on the scheduled dates listed in the table below. However, please note that the actual shipping date may be subject to change due to factors like weather conditions and order volume.
The specific date for shipping your order will be determined according to your zipcode at the time of checkout.
Our plants are shipped bare root, packed in moist sawdust, and securely wrapped in plastic to prevent the roots from drying out. We use USPS Ground Advantage for shipping, ensuring that your plants typically arrive within 2-5 days after packaging.
In case you're unable to plant the trees immediately upon arrival, we recommend soaking them in water for a few hours and temporarily heeling them in. Ideally, they should be planted within three days of receipt for optimal health.
Our 365-Day Plant Guarantee: We ensure that our plants are delivered to you alive and healthy. If your plant does not survive its first year, you're eligible for store credit under these conditions:
You maintain the roots' moisture and plant within three days of delivery, following the instructions in our Planting Guide.
If you're concerned about your plant's health, please consult our guide, How to Tell if Your Tree is Dead or Dormant. Remember, our plants are shipped in a dormant state and may leaf out at different times based on their species. To check for plant vital
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