Troubleshooting
Quercus coccinea problems — and how to fix them
Quercus coccinea (Quercus coccinea) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Lime-induced chlorosis
On chalky or alkaline soils the leaves yellow between the veins because iron uptake is impaired. Plant only on acidic to neutral ground; treat established trees with sequestered iron and acidifying mulches.
Toxic acorn drop
Like all oaks it sheds tannin-rich acorns that are poisonous to dogs and cats. Site away from pet areas and clear fallen acorns where animals may chew them.
Oak wilt (US)
In parts of North America the fungal disease oak wilt can kill red-oak-group trees, including scarlet oak, rapidly. Avoid pruning in the active beetle-flight season (spring to early summer) and seal large wounds promptly.
Slow to transplant large
Oaks resent root disturbance and large transplants establish poorly. Plant as a young whip or container tree and keep well watered for the first seasons.
Prevent quercus coccinea problems before they start
Most quercus coccinea issues are care-mismatch, not bad luck. Dial in the basics:
Looking for quercus coccinea in general rather than its problems? Read the full quercus coccinea care guide — light, water, soil and feeding.
Quercus coccinea problems — FAQ
Why is my quercus coccinea lime-induced chlorosis?
On chalky or alkaline soils the leaves yellow between the veins because iron uptake is impaired. Plant only on acidic to neutral ground; treat established trees with sequestered iron and acidifying mulches.
Why is my quercus coccinea toxic acorn drop?
Like all oaks it sheds tannin-rich acorns that are poisonous to dogs and cats. Site away from pet areas and clear fallen acorns where animals may chew them.
Why is my quercus coccinea oak wilt (us)?
In parts of North America the fungal disease oak wilt can kill red-oak-group trees, including scarlet oak, rapidly. Avoid pruning in the active beetle-flight season (spring to early summer) and seal large wounds promptly.
Why is my quercus coccinea slow to transplant large?
Oaks resent root disturbance and large transplants establish poorly. Plant as a young whip or container tree and keep well watered for the first seasons.