Has anyone experimented with manipulating Spiraea prunifolia ('bridal wreath') flowering time or form through preseason pruning and cold stratification techniques? I am interested in the potential for inducing off-season bloom or achieving more compact, floriferous growth in landscape applications. Additionally, has anyone assessed the impact of varying soil pH and microclimate exposure on flower density and branch architecture in this species? Data, methodologies, or observations regarding integrated approaches are welcomed.
