Smith-Madrone is the site of a Napa Valley pilot project for hillside restoration. The firm PCI Ecological has implemented these innovative techniques in our mountain vineyard!
PCI and California Land Stewardship Institute (CLSI) have been working under a grant from the California State Water Board to restore, re-vegetate, and protect water quality on properties impacted by the 2019 Glass Fire.
Hügelkultur (pronounced HYOO-gul-culture) is a German horticultural technique whose name translates as "mound culture" or "hill culture." The method creates raised planting beds by burying logs, branches, and other woody debris beneath layers of compost and soil. As the wood slowly decomposes, it absorbs and stores water, improves soil structure and aeration, releases nutrients, and supports beneficial fungi and other soil organisms.
Stages of Hügelkultur project. Larger views here
Although variations of the practice have existed in Germany and Eastern Europe for centuries—likely dating to the Middle Ages as a practical way to recycle woody material and improve poor soils—the term Hügelkultur was first published in 1962 by German gardener Hermann Andrä. He described the vigorous plant growth he observed on a pile of decomposing woody debris and proposed mound culture as an alternative to conventional flat gardening. The technique later gained international recognition through Austrian permaculture pioneer Sepp Holzer, who adapted it for the steep mountain terrain of his Krameterhof farm in the Austrian Alps.
Modern research has shown that Hügelkultur mounds can improve water retention, increase soil organic carbon, enhance soil fertility, support biodiversity, and promote healthier microbial and fungal communities.
The setting at Smith-Madrone closely mirrors the conditions that inspired Holzer's work. Like his alpine farm, Smith-Madrone's steep, rocky, dry-farmed mountain vineyard presents challenges of limited water, shallow soils, and woody material generated on-site. Hügelkultur offers a practical, sustainable approach to retaining winter rainfall, increasing organic matter, moderating soil temperatures, recycling vineyard debris, and improving long-term soil health.
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P.O. Box 451/ 4022 Spring Mountain Road, St. Helena, CA 94574
Telephone: 707.963.2283
