Oak, Concordia, Bare Root

Concordia Oak (Quercus × introgressa)

A native oak hybrid with chinkapin, dwarf chinkapin, and swamp white oak ancestry. These seedlings are a mast-planting choice, not the golden-leaved English oak cultivar also called Concordia.

Key Characteristics

Three native oak lineages

Its parentage brings together two chinkapin oaks and swamp white oak. Seedlings vary in form, mature size, and bearing age; early acorns reported from some trees are not a promise for every seedling.

Leaves feed a different food chain

Oak foliage supports caterpillars such as imperial moth and hairstreak larvae; insect-eating birds use this living food supply. Retain some leaf litter and healthy leaf feeding beneath a habitat tree.

Acorns take a compatible planting

White-group oaks generally mature acorns in one growing season. Plant several genetically different trees, preferably of the same species, with overlapping pollen release for a more dependable mast planting.

Product Details

• Native range: A naturally occurring hybrid of North American oaks
• Life cycle: Deciduous woody perennial tree
• Sun: Full Sun; Part Sun/Shade
• Soil moisture: Medium-Dry; Medium; Medium-Wet
• Mature height: 40–50 feet; varies with seedling and site
• Bloom time: April–May
• Bloom color: Green, Yellow
• USDA hardiness zones: 4–8
• Fruit or seed: Acorns for wildlife; crops and bearing age vary among seedlings. Human food use requires correct identification and thorough tannin removal.
• Pollination: Wind-pollinated; plant several genetically distinct trees of the same species or hybrid type for a better chance of overlapping pollen and acorn production.

Planting and Ongoing Care

Keep bare roots moist until planting and spread roots without bending them into a tight hole. Water during establishment, mulch clear of the trunk, and protect young trees from browsing and mowing damage. Base feeding on a soil test; our Tree Planting Kit fertilizer blend can be used according to its label when needed.

Protect young trunks and roots from browsing, mowing, and compaction. Follow regional pruning guidance where oak wilt occurs; retain harmless galls and caterpillar feeding when practical. Avoid insecticides on open flowers. These are seedlings rather than selected clones, so growth, flowering, and fruiting vary.