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Plant profile · Austin & Hill Country

Blackjack Oak

Quercus marilandica
native · Hill Country

Blackjack Oak is a tree native to the Texas Hill Country that grows 14–45 ft tall and 45 ft wide. It wants full sun or part shade and low water, and handles clay soil. Blooms yellow in mid spring. Good for birds and butterflies.

Will it grow in your yard?

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The facts

4 sources
Type
Tree
Sun
Full sun to part shade (3–6 hrs of direct sun)
Water
Low
Height
14–45 ft
Spread
45 ft
Bloom
Mid Spring · yellow
Foliage
Deciduous or dies back in winter
Soil
Takes clay · recorded on dry, gravelly, sand
Wildlife
Supports birds and butterflies

Where it grows

Recorded in these EPA Level IV ecoregions in the Austin and Hill Country launch area:

Balcones CanyonlandsLlano UpliftEdwards Plateau WoodlandNorthern Blackland PrairieSouthern Post Oak SavannaFloodplains and Low TerracesLimestone Cut PlainSan Antonio Prairie

963 occurrence records in Central Texas (GBIF).

Can you buy it?

Also grows here — hard to find. Native and recorded growing in Central Texas, but not on the grower stock lists we read. Sourcing varies: some are stocked widely, others you will have to hunt for.

also grows from seed It starts readily from seed, so a packet from a native-seed supplier, or seed collected with permission, is often the easiest way to get a plant no nursery pots.