Overview

HORN & CO. is a landscape architecture and horticultural firm with offices in Washington, D.C. and Middleburg, Virginia, specializing in the design and implementation of residential and commercial gardens throughout Virginia, Maryland, Washington, D.C., Delaware, and New York.

Founded in 2009 by Jennifer Horn, Horn & Co. creates landscapes that respond to the architecture, terrain, and natural and social histories of a place. Horn studied horticulture at Virginia Tech and earned a Master’s in Landscape Architecture from the University of Georgia. A licensed landscape architect in Virginia, Maryland, and Washington, D.C., and an ISA Certified Arborist, her background brings a strong understanding of plants, ecology, and environmental stewardship to the practice.

Working closely with architects, clients, and allied professionals, Horn & Co. designs landscapes with consideration for how gardens change through the seasons and mature over time. The firm prioritizes site-appropriate plantings, native species, responsible materials, and sustainable practices, seeking to enhance the natural environment while respecting the character and history of each site.

Horn & Co. has received recognition from the Association of Professional Landscape Designers and regional chapters of the American Society of Landscape Architects. The firm’s work has appeared in Home & Design, Landscape Architecture Magazine, The Washington Post, Washingtonian, and Milieu, among other publications.

Areas Served

Washington, D.C. & the Capital Region: Based in Washington, D.C., Horn & Co. works throughout the District, Northern Virginia, and Maryland, including Arlington, Alexandria, Bethesda, Chevy Chase, Potomac, and surrounding communities. Projects range from intimate urban gardens to larger residential properties and estates.

Middleburg & Virginia Hunt Country: From its Middleburg office, Horn & Co. works throughout Virginia Hunt Country and the surrounding Piedmont. The region’s agricultural and equestrian traditions, rolling terrain, native ecology, and history of land stewardship inform the firm’s approach to gardens and larger landscapes.

Mid-Atlantic & Beyond: Horn & Co. undertakes projects throughout Virginia, Maryland, Washington, D.C., Delaware, and New York, as well as select commissions beyond the region. Experience working across varied climates and terrains informs a design approach grounded in the particular qualities of each site.

Services

Landscape Architecture & Garden Design: Horn & Co. designs residential and commercial landscapes ranging from small gardens to expansive properties. Working in dialogue with the architecture and surrounding terrain, the firm composes outdoor spaces for gathering, recreation, and retreat, including terraces, pergolas, swimming pools, sports areas, community gardens, herb gardens, and potagers. Each landscape is considered as part of the larger setting rather than as an element separate from the architecture or site.

Horticulture & Planting Design: Planting is central to Horn & Co.’s work. The firm selects plants for their relationship to climate, soil, existing ecology, seasonal progression, and the long-term character of a garden. Native and site-appropriate species are prioritized, with careful consideration given to plant health, habitat, and the way a landscape will develop and adapt over time.

Sustainable Landscape Design: Horn & Co. incorporates responsible environmental practices throughout the design and implementation process. Strategies may include managing stormwater, preserving established trees and habitat, using local materials and ethically sourced products, and supporting organic gardening practices. The firm’s approach seeks to enhance the beauty of the natural world while minimizing impact on the ecosystems and environments in which it works.