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Species Native to Missouri
Common Name: hardy pecan
Type: Tree
Family: Juglandaceae
Zone: 5 to 9
Native Range: Iowa and Indiana south to Texas and Mexico
Height: 75 to 100 feet
Spread: 40 to 70 feet
Bloom Time: April to May
Bloom Color: Green, Yellow
Bloom Description: Greenish-yellow
Sun: Full sun
Water: Medium
Maintenance: Medium
Flowers: Flowers not Showy
Fruit: Showy Fruit, Edible Fruit
Tolerates: Black Walnuts
Uses: Shade Tree
Culture
Best grown in humusy, rich, moist, well-drained soils in full sun. Difficult to transplant because of its deep taproot. If grown for nut production, plant at least two different varieties for best cross-pollination. Nut production can be sparse in the northern part of its growing range, particularly when spring is late and summer is cool. May be grown from seed, but it normally takes 8-10 years for a young tree to bear a nut crop.
Noteworthy Characteristics
Pecan is a large deciduous lowland tree, the largest of the hickories. It typically grows 75-100’ (infrequently to 150’) tall with a large rounded spreading crown. Trunks mature to 2-4’ in diameter. It is native from Iowa, Illinois, Indiana and Ohio south to Alabama and Mexico, being primarily found in the Mississippi River valley and the valleys of its principal tributaries. In Missouri, it occurs in river flood plains and margins of river bottom prairie, mostly in counties bordering the Mississippi, Missouri, Osage, South Grand and Grand Rivers (Steyermark). It is the state tree of Texas. Pecan features medium green odd-pinnate compound leaves, with each leaf having 9-17 pointed leaflets. Leaflets range from 2-7” long. Leaves mature to yellow green in summer, eventually turning yellow brown in fall. Non-showy, monoecious greenish yellow flowers appear in April-May, the male flowers in pendulous catkins (to 4” long) and the female flowers in short spikes. Female flowers give way to sweet, edible nuts. Each nut is encased in a thin husk which splits open in four sections when ripe in fall. Pecans are an important commercial nut crop in the U.S. Most pecan commercial plantings are located in the southern U. S., from North Carolina to Florida west to Arizona and California. Many cultivars are available. Pecans are sometimes grafted onto the roots of other hickories (e.g., Carya cordiformis) so that they can be planted further north of their normal growing range.
Problems
No serious insect or disease problems. Scab can infect both nuts and foliage, although scab resistant cultivars are available. Aphids, pecan weevils, twig girdlers and fall webworms can also do damage.