A mixed-methods assessment of residential gardens in metropolitan Portland, Oregon, USA
Download PDFMcClintock, Nathan, Dillon Mahmoudi, Michael Simpson, and Jacinto Pereira Santos. 2016. “Socio-Spatial Differentiation in the Sustainable City: A Mixed-Methods Assessment of Residential Gardens in Metropolitan Portland, Oregon, USA.” Landscape and Urban Planning 148 (April): 1–16. doi:10.1080/01944363.2015.1135072
See other related articles on Nathan McClintock’s website.
Abstract
Problem, research strategy, and findings: In recent years, some economists and urban development advocates have argued that historic preservation is fundamentally at odds with a growing, diverse economy. We supply empirical support for Jane Jacobs’s (1961) seminal argument about the value of “plain, ordinary, low-value old buildings,” finding that older, smaller buildings support dense, diverse streets and neighborhoods (p. 187). We use spatial regression models to analyze how social and economic activity relate to building characteristics in Seattle (WA), San Francisco (CA), Tucson (AZ), and Washington, DC. On a per commercial square foot basis, areas with older, smaller buildings and mixed-vintage blocks support more jobs in new businesses, small businesses, and businesses in creative industries. However, while areas with older, smaller buildings have greater diversity of resident age and higher proportions of small businesses, we also find lower proportions of Hispanic and non-White residents, indicating limited racial and ethnic diversity.
Takeaway for practice: Focusing on new construction alone to achieve denser, more sustainable cities elides the important role that older, smaller buildings play in dense, diverse neighborhoods. Planners should support the preservation and reuse of older buildings and the integration of old and new buildings. Relevant policies include adaptive reuse ordinances, performance-based energy codes, context-sensitive form-based coding, and deregulation of parking requirements.
Summary
As cities take center stage in developing and brokering strategies for sustainability, examining the uneven distribution of green infrastructure is crucial. Urban agriculture (UA) has gained a prominent role in urban greening and food system diversification strategies alike. Despite that it is the preeminent form of food production in North American cities, residential gardening has received little scholarly attention. Moreover, research on the intra-urban variability of home gardens is sparse. In this paper, we use a mixed-methods approach to assess the scale and scope of residential gardens in Portland, Oregon, a metropolitan region renowned for its innovations in sustainability. Using a combination of mapping, spatial regression, and a mail survey, we compare residential UA and the characteristics and motivations of gardeners in two socioeconomically differentiated areas of Portland and one of its major suburbs. Results demonstrate that engagement in UA is differentiated along both spatial and socioeconomic lines, with more educated respondents engaging for environmental reasons and more low-income respondents relying on their gardens for food security. We contextualize our findings within broader urban processes, e.g. reinvestment in the urban core and displacement of poverty to the periphery.
For policymakers, our results suggest the need for sustainability messaging that is sensitive to a variety of motivations and that resonates with a diverse population. For a city to reach a broader population, it may need to reframe its sustainability goals in new ways, while attending to the structural constraints to food access that cannot be resolved through local food production alone.
