Stonecrop in November: monthly care

Sedum spectabile requires minimal pruning, but a tidy-up once or twice a year keeps plants looking their best and encourages vigorous growth. The main pruning window is March or November, and your choice of timing depends on your garden style and local wildlife. Many gardeners leave the spent flowerheads standing over winter. The dried seedheads look attractive under frost, provide food for finches and other seed-eating birds, and offer shelter for overwintering insects. If you take this approach, cut back the old stems in March, just as new growth begins to emerge at the base. Use secateurs or sharp shears to remove all the previous year's growth down to within a few centimetres of ground level. The fresh shoots will quickly fill out. Alternatively, cut back in November after flowering finishes and the foliage starts to collapse. This gives a neater appearance through winter and reduces the risk of slug and snail damage to emerging shoots in spring, as there's less decaying material for them to hide under. Again, cut stems down close to the base. Sedum spectabile does not require any shaping, thinning, or formative pruning. If clumps become congested or flowering diminishes after several years, lift and divide them in March or April rather than pruning. Replant vigorous outer sections and discard the woody centre. Deadheading during the flowering season is unnecessary unless you dislike the look of fading blooms; the seedheads are part of the plant's charm and leaving them does no harm.

Sedum spectabile is one of the easiest perennials to maintain, thriving on neglect once established. Its succulent leaves store water, so it has low water needs and tolerates drought well. Water newly planted sedums lightly during dry spells in their first summer, but after that, rainfall is usually sufficient. Avoid overhead watering and never allow the soil to stay wet, as this can cause root rot. Feed sparingly. In March or April, scatter a light dressing of general-purpose granular fertiliser (such as blood, fish and bone) around the base of the plant, or apply a low-nitrogen feed if your soil is already fertile. Over-feeding, especially with high-nitrogen fertilisers, produces lush, floppy growth that collapses under the weight of the flowerheads. Sedums perform best in lean, free-draining soil. Sedum spectabile is fully hardy and needs no winter protection. The crown may look dormant or even disappear below ground in winter, but it will resprout reliably in spring. Avoid mulching with organic matter directly over the crown, as this can encourage rot. Pests and diseases are rare. Slugs and snails occasionally nibble young shoots in spring; check plants in damp weather and remove any pests by hand. Vine weevil larvae can damage roots in containers, so inspect potted sedums if growth seems weak. Root rot caused by poor drainage is the most common problem—ensure your soil is gritty and never waterlogged. Otherwise, sedum spectabile asks very little of you and rewards minimal care with reliable late-summer and autumn flowers that attract bees and butterflies.