Bur Oak

Year-round

Bur oak is a big, long lived native shade tree that does well in North Texas heat and clay once it gets established, but it grows slowly and needs a few patient years to get there.

• Give it full sun and room to spread. A mature bur oak can reach 60 to 80 feet tall and just as wide, so keep it well clear of the house, driveway, and power lines.
• It is one of the few oaks that tolerates alkaline soil, so it handles both the heavy black clay of the Blackland Prairies and the sandier loam of the Cross Timbers without amendment.
• It grows a long taproot early on and adds height slowly, often under a foot a year while young, so do not expect fast results the first several seasons.
• Once established, usually after its second or third growing season, it needs little to no supplemental water and shrugs off Texas drought and heat.
• It hosts caterpillars of the banded hairstreak and white marked tussock moth, part of what makes native oaks valuable for yard wildlife.

Fall

Fall is the best planting window for a young bur oak in North Texas, and from October into November the tree drops its large acorns and leaves.

• Plant new bur oak trees in October or November. Cooler air and still warm soil let roots establish before next summer's heat arrives.
• Rake and remove fallen acorns from walkways and the front lawn regularly. Left alone they can be a slipping hazard and sprout as volunteer seedlings.
• The leaves are large and slow to break down, so mow over a light layer or add them to a compost pile rather than leaving thick mats on turf.
• Hold off on structural pruning until the tree is fully dormant in winter.
• Acorns and fallen leaves contain tannins that can upset a pet's stomach if eaten in quantity, so clear them from areas a dog spends time in.

Regular raking of acorns and leaves off the front walk and lawn keeps a young oak's messier season from reading as an unkept yard.

Winter

Bur oak is dormant through a North Texas winter and needs almost no attention beyond an occasional structural prune while it is bare.

• Prune only to remove dead, damaged, or crossing branches, and do it while the tree is fully dormant, from December through February.
• Do not fertilize in winter. Wait until the tree is actively growing again in spring if it needs it.
• An established tree needs no winter watering. A tree still in its first year can get an occasional deep soak if the season stays unusually dry.
• Established bur oaks tolerate North Texas's short hard freezes and the occasional severe Arctic outbreak without any winter protection.

Spring

Spring is a good time to plant a young bur oak, and small yellow green flower clusters called catkins appear in April and May before any acorns start forming.

• Plant a container grown or balled and burlapped tree in March or early April so roots have time to settle before the July heat.
• Water a new transplant deeply twice a week through spring, letting the top couple inches of soil dry out between waterings.
• Skip fertilizer. Bur oak does not need it in typical North Texas soil and it can push weak, fast growth on a young tree.
• The yellow green catkins you see in April and May are normal flowering, not a pest or disease problem.
• Keep 2 to 3 inches of mulch over the root zone, pulled back a few inches from the trunk, and refresh it after spring rains wash it thin.

A neat mulch ring around a newly planted tree reads as a deliberate, cared for planting rather than an empty patch of yard.

Summer

July and August are the hardest months for a bur oak, especially one planted in the last year or two. An established tree coasts through the heat but a young one still needs help.

• In a tree's first two summers, water deeply once a week during stretches with no rain, and let the top few inches of soil dry between waterings.
• A tree established more than about 3 years usually needs no supplemental water even through a Texas summer, thanks to its deep taproot.
• Brown, crispy edges on leaves during 100F stretches are a heat stress sign on a young tree, not a disease, and usually ease once temperatures drop.
• Hold off on pruning in summer. Wait for the dormant season so the tree is not stressed further while it is already working hard in the heat.
• Keep the mulch ring in place through the hottest months to hold soil moisture and keep string trimmers and mowers away from the trunk.

A mulched ring and visibly healthy leaves through late summer read as a maintained tree, not a neglected one.

Year-round

Bur oak is a big, long lived native shade tree that does well in North Texas heat and clay once it gets established, but it grows slowly and needs a few patient years to get there.

• Give it full sun and room to spread. A mature bur oak can reach 60 to 80 feet tall and just as wide, so keep it well clear of the house, driveway, and power lines.
• It is one of the few oaks that tolerates alkaline soil, so it handles both the heavy black clay of the Blackland Prairies and the sandier loam of the Cross Timbers without amendment.
• It grows a long taproot early on and adds height slowly, often under a foot a year while young, so do not expect fast results the first several seasons.
• Once established, usually after its second or third growing season, it needs little to no supplemental water and shrugs off Texas drought and heat.
• It hosts caterpillars of the banded hairstreak and white marked tussock moth, part of what makes native oaks valuable for yard wildlife.

Fall

Fall is the best planting window for a young bur oak in North Texas, and from October into November the tree drops its large acorns and leaves.

• Plant new bur oak trees in October or November. Cooler air and still warm soil let roots establish before next summer's heat arrives.
• Rake and remove fallen acorns from walkways and the front lawn regularly. Left alone they can be a slipping hazard and sprout as volunteer seedlings.
• The leaves are large and slow to break down, so mow over a light layer or add them to a compost pile rather than leaving thick mats on turf.
• Hold off on structural pruning until the tree is fully dormant in winter.
• Acorns and fallen leaves contain tannins that can upset a pet's stomach if eaten in quantity, so clear them from areas a dog spends time in.

Regular raking of acorns and leaves off the front walk and lawn keeps a young oak's messier season from reading as an unkept yard.

Winter

Bur oak is dormant through a North Texas winter and needs almost no attention beyond an occasional structural prune while it is bare.

• Prune only to remove dead, damaged, or crossing branches, and do it while the tree is fully dormant, from December through February.
• Do not fertilize in winter. Wait until the tree is actively growing again in spring if it needs it.
• An established tree needs no winter watering. A tree still in its first year can get an occasional deep soak if the season stays unusually dry.
• Established bur oaks tolerate North Texas's short hard freezes and the occasional severe Arctic outbreak without any winter protection.

Spring

Spring is a good time to plant a young bur oak, and small yellow green flower clusters called catkins appear in April and May before any acorns start forming.

• Plant a container grown or balled and burlapped tree in March or early April so roots have time to settle before the July heat.
• Water a new transplant deeply twice a week through spring, letting the top couple inches of soil dry out between waterings.
• Skip fertilizer. Bur oak does not need it in typical North Texas soil and it can push weak, fast growth on a young tree.
• The yellow green catkins you see in April and May are normal flowering, not a pest or disease problem.
• Keep 2 to 3 inches of mulch over the root zone, pulled back a few inches from the trunk, and refresh it after spring rains wash it thin.

A neat mulch ring around a newly planted tree reads as a deliberate, cared for planting rather than an empty patch of yard.

Summer

July and August are the hardest months for a bur oak, especially one planted in the last year or two. An established tree coasts through the heat but a young one still needs help.

• In a tree's first two summers, water deeply once a week during stretches with no rain, and let the top few inches of soil dry between waterings.
• A tree established more than about 3 years usually needs no supplemental water even through a Texas summer, thanks to its deep taproot.
• Brown, crispy edges on leaves during 100F stretches are a heat stress sign on a young tree, not a disease, and usually ease once temperatures drop.
• Hold off on pruning in summer. Wait for the dormant season so the tree is not stressed further while it is already working hard in the heat.
• Keep the mulch ring in place through the hottest months to hold soil moisture and keep string trimmers and mowers away from the trunk.

A mulched ring and visibly healthy leaves through late summer read as a maintained tree, not a neglected one.