Concordia Oak (Quercus × introgressa ‘Concordia’) Concordia Oak is a striking golden-leaved cultivar of a hybrid oak (Quercus robur × Quercus macrocarpa) known for its bold foliage, fast growth, and strong structure. While not a U.S. native, it is a valuable ornamental shade tree with excellent disease resistance, tolerance for urban and compacted soils, and strong ecological potential when integrated thoughtfully into diverse planting systems. Its vivid yellow spring foliage maturing to chartreuse or green makes it a standout specimen in parks, large gardens, and landscape designs where visual impact and hardiness are desired. Key Characteristics Golden spring foliage for high visual impactConcordia Oak flushes in spring with bright golden-yellow leaves that mature to a soft green or remain chartreuse, depending on site and sun exposure. The foliage provides season-long brightness and contrast in mixed plantings or as a specimen tree. Tough and adaptable to urban and disturbed sitesThanks to its hybrid parentage, Concordia tolerates poor, compacted, and alkaline soils. It is well-suited for urban greening, street plantings, or large-scale landscapes where resilience is key. Fast-growing and structurally strongWith a sturdy branching habit and broad oval form, this tree establishes quickly and provides excellent shade. It's ideal for creating fast canopy cover in open spaces or as a visual anchor in landscape design. Low-maintenance and disease resistantConcordia Oak is generally resistant to powdery mildew, oak wilt, and other common oak diseases, making it a reliable choice for low-input plantings where longevity and minimal care are important. Supports wildlife as part of oak familyWhile not as ecologically rich as native oaks, Concordia still produces acorns (though often in lower quantities) that are eaten by squirrels and birds, and it can host some native insect life due to its oak lineage—especially if planted near native oak species. Product Details Origin: Hybrid of Quercus robur (English Oak) × Quercus macrocarpa (Bur Oak); cultivar Plant life cycle: Deciduous Tree Sun requirements: Full sun Soil requirements: Medium-dry to medium; tolerant of clay, compacted, and alkaline soils Mature height: 40–60 feet Bloom time: Spring Bloom color: Inconspicuous yellow-green catkins USDA Hardiness zones: 4–8 Concordia Oak is a standout ornamental oak with golden spring foliage and rugged performance. It's ideal for urban and designed landscapes where aesthetics, shade, and resilience are equally important.
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