Performance of Native Plant Genotypes (Glandularia-Verbenaceae) on Semi-Intensive Green Roofs With Low Maintenance Requirements.

SUAREZ, M.; GALETTO, L.; CÁCERES, N.; HICK, E.; MATOFF, EVANGELINA; IMHOF, L.

Cities and the Environment

Loyola Marymount University

Lugar: Los Angeles; Año: 2019 vol. 12

Assessing performance and selection of plant species that survive on vegetated green roofs can help toimprove green roof functioning under harsh conditions and with low maintenance. It is necessary toincrease the available options in the materials for the green roof industry considering long-term plantsurvival on rooftops of semiarid regions of South America. Although water is often a limiting factor forplants on green roofs, selection of some native materials can succeed in the semiarid regions ofArgentina. This research explores the potential of 16 Glandularia genotypes for semi-intensive green roofunder low maintenance; they were evaluated by the dynamics of the coverage area, plant survival andhealth status on modules simulating green roof conditions, during two growing periods (autumn-winterand spring-summer). An overall performance index (green roof fitness index, combining themeasurements of plant traits) was applied to compare and rank the materials. Half of the Glandulariahybrids in process of genetic improvement can be considered as promising materials. The goodperformance of most plant indicators (e.g., dynamics of coverage area, health status, survival ) in theserecommended materials allow us to predict their adequate performance on semi-extensive green roofsunder semi-arid conditions