The Cultivation of Stave-Quality Oak

Without human intervention, forests would not be able to produce wood in sufficient quantity or quality to meet society’s needs while continuing to thrive. This is why specific forestry practices and management plans must be implemented for each tree species, depending on their intended use.

French merrain oak represents exceptional wood quality, intrinsically tied to a cultivation method requiring consistent management over centuries: sylviculture in regular forest stands. This forestry practice, largely inherited from Colbert’s reforms and the Ordonnance of 1669, involves foresters actively managing trees at every stage of their life cycle to ensure high-quality timber while maintaining forest vitality and sustainability.

A regular forest stand refers to a stand where the trees within a parcel are of approximately the same age and size, in contrast to an irregular forest stand.

A pure stand consists of a single tree species, while multiple species coexist in a mixed stand. Starting at 50 years old, during the perchis stage*, the finest oaks—known as future trees—are identified based on their physical and genetic qualities. These trees, primarily destined for merrain, will make up the final stand of the parcel, which is harvested on average at 180 years of age. In 2022, foresters will harvest merrain oaks whose acorns germinated between 1820 and 1840.

As a slow-growing and light-demanding species, oak seedlings cannot survive more than three years in the understory. This makes it necessary to create wide clearings to allow seedlings the time to establish themselves, particularly in fertile soils where competition from other species can be intense. Oaks can grow in dense stands of same-sized trees and will develop as soon as space becomes available.

In a forest stand, competition among neighboring oaks forces them to reach for light. As a result, forest-grown oaks develop straight trunks, with branches primarily growing in the upper canopy** (houppier).

Thanks to this silvicultural technique, forest-grown oaks are ideally tall, straight-grained, and develop few branches on the lower part of their trunk. Beyond this structural aspect, essential for cooperage, their slow and steady growth results in very fine grain with tightly packed growth rings. The grain of the wood determines its level of porosity, which directly impacts the subtlety of interactions between the oak and the alcohol (wine or spirits) it contains.

*The regeneration cycle of an oak forest grown in regular forest stands comprises six stages of development: seedlings (0-5 years), thicket (5-10 years), sapling (10-25 years), poles (25-75 years), mature stand (75-180 years), and regeneration stand (180-240 years).

**The collection of branches, twigs, and leaves growing at the crown of a tree, above the trunk

Photographs © Christophe Deschanel