Holm Oak

Quercus ilex

Also known as Evergreen Oak, Holly Oak, Encina, Ilex Oak

At a glance

Family

Fagaceae (beech family)

Type

Evergreen tree

Parts used

Bark, leaves, acorns

Size

40 to 60 feet tall, sometimes reaching 90 feet with a broad, rounded crown

Bloom

Small yellow-green catkins in spring, April to May

Habitat

Mediterranean hillsides, dry rocky slopes, coastal woodlands, and old wooded pastures

Acquisition

Forage

Traditional remedies in HerbSense

Key benefits

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Traditionally astringent and soothing

Supports minor skin healing

Eases occasional loose stomach

Calms a scratchy throat

Traditional uses

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Long before it shaded pilgrims and shepherds across Spain, Italy, and Provence, the holm oak was already a fixture of Mediterranean life, its dense evergreen canopy offering shelter through every season and its acorns sweet enough, once leached of their bitterness, to be ground into a rustic flour during lean harvest years. Herbalists across the region turned to its tannin-rich bark much as northern healers turned to white oak, steeping it into decoctions used as a gargle for sore throats and a wash for minor skin troubles, valuing its firm, drawing, astringent quality. The tree itself became a quiet symbol of endurance, standing green through winters that stripped its neighbors bare, and its acorns fattened the pigs of Iberian farmsteads for generations. It is a plant known as much through the working landscape it built as through the tea kettle.

How to grow & use it

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The full apothecary for Holm Oak

Traditional remedies and step-by-step preparations, a complete growing guide, and how to harvest, dry, and store it, all unlocked with HerbLens Unlimited.

✦Remedies & preparations
✦ Growing guide
✦Harvest & storage

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Pairs well with

✦Sage
✦Chamomile
✦Thyme

Substitutes

✦White Oak bark (Quercus alba)
✦English Oak bark (Quercus robur)

Choose it when

“For the tree that keeps its green cloak through winter, and the bark that has long steadied a rough throat.”

Did you know?

Holm oak acorns are naturally sweeter and less bitter than those of most oaks, and in parts of Spain and Portugal they were traditionally fed to free-ranging black pigs during the autumn montanera, the fattening season that gives acorn-fed Iberian ham its distinctive nutty flavor.

Safety

Holm oak bark is high in tannins and traditionally used only in small, occasional amounts, since prolonged internal use can upset the stomach. Raw acorns are strongly astringent and should never be eaten unleached.