American Holly

Year-round

American holly is a slow-growing evergreen tree that likes moist, neutral to acidic soil and shelter from winter wind.

• Plant in full sun to partial shade. In hot summers give it afternoon shade.
• Use moist, neutral to acidic soil. It tolerates occasionally wet or dry soil but not flooding, and yellow leaves can show up in alkaline soil.
• It is dioecious. Only female trees bear berries, and they need a nearby male.
• The ASPCA lists American holly as toxic to dogs, cats, and horses because of saponins.

Fall

Water well into fall to help prevent winter burn.

• Keep watering into mid or late November as long as the ground has not frozen. Newly planted evergreens may need around 2 inches of water per week, including rain.
• Protect it from cold winter winds and winter sun.

Winter

Shelter from wind and sun is the winter job.

• Protect it from cold winter winds and winter sun.
• Listed hardy in USDA zones 5a through 9b.
• It is slow growing, 40 to 60 feet tall and 10 to 20 feet wide, so avoid planting it where it will be crowded.

Spring

Spring is for checking leaf damage and soil drainage.

• Avoid poorly drained soil.
• Leaf scorch, twospotted spider mites, and soft scale are listed problems.
• Only female trees fruit, so confirm a male is nearby.

Summer

Give moisture and some afternoon shade in heat.

• In hot summer climates, give it afternoon shade.
• It prefers moist soil and tolerates occasional dry spells but not flooding.
• Watch for spider mites and soft scale insects.

Year-round

American holly is a slow, tough evergreen tree that suits Tallahassee's climate well, and it is a different species from deciduous winterberry holly, so don't apply winterberry care advice to it.

• Give it full sun to partial shade, more sun means more berries on a female tree
• Plant in moist, well-drained, slightly acidic soil, it adapts to sand, loam, or clay as long as it isn't soggy
• Water deeply during dry spells, established trees are quite drought tolerant
• Needs very little pruning beyond removing dead or crossing branches
• Mulch to hold moisture, but keep mulch off the trunk itself
• The ASPCA lists American holly berries as toxic to dogs, cats, and horses (saponins), so keep grazing pets away from dropped berries

Its dense evergreen form and classic look make it a reliable, HOA-friendly privacy or accent tree year-round.

Fall

Fall is when a female American holly shows off its bright red berries, which look festive but are toxic to pets if eaten in quantity.

• The ASPCA lists holly berries as toxic to dogs, cats, and horses (saponins), with signs like vomiting and diarrhea, so keep grazing pets away from fallen berries
• Rake up dropped berries in areas where pets spend time
• Fall is a good time to plant a new holly tree so roots settle in before next summer
• Hold off on pruning until the tree goes fully dormant

Bright red winter berries are a classic, HOA-friendly seasonal touch, especially in a foundation planting.

Winter

Tallahassee winters are mild, and this evergreen holds its leaves and berries through the season with little care needed.

• Established trees tolerate the area's typical winter lows without protection
• This dormant season is the best window for any structural pruning
• Water occasionally during dry winter spells
• If you bring berried branches indoors for decor, keep them well out of reach of pets given the ASPCA's toxic listing

Spring

Spring brings a flush of new growth and small white flowers on American holly, which female trees turn into fall berries if a male tree is nearby.

• Water regularly to support the spring growth flush
• This is fine for minor shaping, but save any major pruning for dormancy
• Watch new growth for scale insects or leaf miner
• Only female trees produce berries, and they need a male tree nearby to pollinate

Summer

In Tallahassee's hot, humid summer an established American holly needs little beyond occasional deep watering and a good mulch layer.

• Deep water during extended dry spells, established trees otherwise handle summer heat well
• Keep mulch 2 to 3 inches deep and away from the trunk
• Spider mites can show up in hot, dry stretches, hose off foliage if you spot them
• Skip heavy fertilizing during peak summer heat