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Oxydendrum arboreum (Sourwood)

Sorrel Tree, Sourwood, Titi, Andromeda arborea

Oxydendrum arboreum,Sorrel Tree, Sourwood, Titi, Andromeda arborea
Oxydendrum arboreum,Sorrel Tree, Sourwood, Titi, Andromeda arborea

Prized for its multi-season interest, Oxydendrum arboreum (Sourwood) is a slow-growing, deciduous tree of delicately pyramidal habit with a slender trunk and a narrow oblong crown. Its slightly pendulous branches are clothed with alternate, finely toothed, glossy green leaves, which turn brilliant crimson-red to dark purple in the fall. The leaves have a sour taste, hence the common name. In early summer, fragrant, urn-shaped, creamy-white flowers resembling those of lily-of-the-valley are borne in drooping, one-sided panicles up to 10 in. long (25 cm) at the branch tips. Attractive to bees, they bloom for about 3-4 weeks and are followed by small, silver-gray capsules that persist through winter and contrast well with the red foliage. The gray bark is fissured, ridged and scaly on mature trees, providing winter interest. A gorgeous flowering tree that offers year-round interest and is a great choice for naturalizing in acid soils. Excellent specimen, patio, or lawn tree. The flowers are used to make prized honey.

  • Grows up to 20-30 ft. tall and wide (6-9 m) but can reach 50 ft in height (15m) in the wild.
  • Performs best in organically rich, moist, acidic, well-drained soils in full sun or part shade. Best flower production and foliage color is obtained in full sun. The tree does reasonably well in dry, neutral soils and is moderately tolerant of salt.
  • Perfect as a specimen plant for cottage gardens, shade gardens, or woodland gardens.
  • Generally pest and disease-free. Deer resistant.
  • No routine pruning is necessary. Remove diseased, damaged, congested, or crossing shoots.
  • Propagate by seed and semi-hardwood cuttings.
  • Native to the eastern United States from Pennsylvania south to Florida and Louisiana.

Requirements

Hardiness 5 - 9
Heat Zones 3 - 9
Climate Zones 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17
Plant Type Trees
Plant Family Ericaceae
Common names Sourwood, Titi
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early, Mid, Late)
Fall
Winter
Height 20' - 30'
(6.1m - 9.1m)
Spread 20' - 30'
(6.1m - 9.1m)
Maintenance Low
Water Needs Low, Average
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Northeast, Pennsylvania, Rhode Island, Maryland, New York, Illinois, Indiana, Ohio, Midwest, Southeast, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Alabama, Florida, Georgia, Kentucky
Tolerance Deer, Salt, Dry Soil
Attracts Bees
Garden Styles Informal and Cottage
How Many Plants
Do I Need?
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 5 - 9
Heat Zones 3 - 9
Climate Zones 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17
Plant Type Trees
Plant Family Ericaceae
Common names Sourwood, Titi
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early, Mid, Late)
Fall
Winter
Height 20' - 30'
(6.1m - 9.1m)
Spread 20' - 30'
(6.1m - 9.1m)
Maintenance Low
Water Needs Low, Average
Soil Type Clay, Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Northeast, Pennsylvania, Rhode Island, Maryland, New York, Illinois, Indiana, Ohio, Midwest, Southeast, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Alabama, Florida, Georgia, Kentucky
Tolerance Deer, Salt, Dry Soil
Attracts Bees
Garden Styles Informal and Cottage
How Many Plants
Do I Need?

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