When to plant Knotted cranesbill?

Geranium nodosum thrives in partial to full shade, making it an excellent choice for woodland gardens, shady borders, or beneath trees where many other perennials struggle. It tolerates a wide range of soil types—loam, sandy soil, and clay—but performs best when the ground is reasonably well-drained and enriched with organic matter. Before planting, dig over the area to a spade's depth and work in garden compost or well-rotted manure to improve structure and moisture retention. Plant in March, April, or May for spring establishment, or in September and October for autumn planting. Autumn planting allows roots to settle before winter, but spring planting works equally well in heavier soils prone to waterlogging. Space plants 35 cm apart to allow for their mature spread of 30–45 cm; they will gradually knit together to form a low, weed-suppressing carpet. Dig a planting hole slightly larger than the root ball, set the plant so the crown sits level with the surrounding soil, and firm in gently. Water thoroughly after planting, even though this geranium has low water needs once established—initial watering helps roots make good contact with the soil. Apply a 5 cm layer of leaf mould, composted bark, or garden compost around the base to conserve moisture, suppress weeds, and mimic the woodland floor conditions this species enjoys. Avoid planting in hot, sunny spots or very dry soil, as Geranium nodosum prefers the cooler, moister microclimate of shade.