This study investigates the effectiveness of small-scale floral additions in enhancing urban bee populations, specifically small Halictid bees. The researchers placed different quantities of potted sweet alyssum flowers at 16 sites in Ann Arbor, Michigan, over two consecutive years and monitored the resulting bee activity. The results show that the number of flowers added was significantly and positively correlated with small Halictid bee abundance and species density in urban landscapes. At smaller flower quantities, the relationship was linear, with incremental increases in flower quantity leading to significant increases in bee abundance and species density. However, at larger flower quantities, the dynamics became nonlinear, with no significant effect on bee abundance and variable effects on bee species density. When comparing the change in bee abundance and species density from one year to the next, there was a significant increase in bee species density but no significant change in bee abundance. The study suggests that small-scale floral plantings can effectively attract small Halictid bees in urban areas, even over short periods, and that spreading multiple, smaller flower plantings across urban landscapes may be more effective than concentrating resources into one large floral patch.This study investigates the effectiveness of small-scale floral additions in enhancing urban bee populations, specifically small Halictid bees. The researchers placed different quantities of potted sweet alyssum flowers at 16 sites in Ann Arbor, Michigan, over two consecutive years and monitored the resulting bee activity. The results show that the number of flowers added was significantly and positively correlated with small Halictid bee abundance and species density in urban landscapes. At smaller flower quantities, the relationship was linear, with incremental increases in flower quantity leading to significant increases in bee abundance and species density. However, at larger flower quantities, the dynamics became nonlinear, with no significant effect on bee abundance and variable effects on bee species density. When comparing the change in bee abundance and species density from one year to the next, there was a significant increase in bee species density but no significant change in bee abundance. The study suggests that small-scale floral plantings can effectively attract small Halictid bees in urban areas, even over short periods, and that spreading multiple, smaller flower plantings across urban landscapes may be more effective than concentrating resources into one large floral patch.