Effects of Soil Depth and Irrigation Period on Some of the Native Plants in and Artificial Substrate of Roof Garden

Urban Farm DB summary

This study, conducted from March to September 2002, investigated the growth response of five native plant species (Chrysanthemum zawadskii, Sedum middendorffianum, Thymus quinquecostatus, Allium senescens, Dianthus superbus) to artificial substrate soil depths (5 cm, 10 cm) and irrigation periods (non-irrigation, 1, 2, 3 weeks) for rooftop gardens. Sedum middendorffianum and Allium senescens showed 0% mortality regardless of soil depth and irrigation, making them highly suitable. Chrysanthemum zawadskii, Dianthus superbus, and Thymus quinquecostatus generally performed better with 10 cm soil depth, suggesting a minimum viable depth over 10 cm for these species.