# Perennial plant propagation and soil maintenance > Live situation record from CLSTR: https://clstr.news/situations/perennial-plant-propagation-and-soil-maintenance > Updated: 2026-09-14T12:32:26.000Z. Sources: 4. Developments: 2. Gardening guidance focuses on the propagation of perennials and soil maintenance during the transition to autumn. Initial advice emphasizes expanding gardens through the division of perennials like peonies, daylilies, and irises. This process involves separating root balls into sections with healthy roots and buds to rejuvenate overcrowded plants. Soil health is also highlighted, with recommendations to remove diseased debris and use compost or green manure to improve structure. Experts suggest performing soil analysis before fertilizing to distinguish nutrient deficiencies from drought or disease. Subsequent guidance refines these practices, specifying that autumn division is most effective from late August to mid-October. To support root development, it is recommended to trim leaves by one-third to one-half to reduce water evaporation. Specific care for sedum is also noted, warning that while nitrogen is necessary, excessive application can compromise the plant’s structural firmness. Gardeners are advised to avoid automatic fertilization after heavy rain to prevent waterlogging issues. ## Timeline ### 2026-09-14: Perennial gardening: Tips for plant division and sedum care Expert advice on maintaining perennials through autumn division and the specific fertilization needs of sedum to ensure plant health and structural strength. 2 sources. https://clstr.news/cluster/perennial-gardening-tips-for-plant-division-and-sedum-care ### 2026-09-02: Gardening advice for perennial propagation and soil maintenance Gardening advice covers propagating perennials through division to rejuvenate plants and managing soil health after harvest using organic methods and debris removal. 3 sources. https://clstr.news/cluster/gardening-advice-for-perennial-propagation-and-soil-maintenance --- Cite as: Perennial plant propagation and soil maintenance. CLSTR, https://clstr.news/situations/perennial-plant-propagation-and-soil-maintenance