How to Care for Sedum

Sedum (Sedum spectabile), the showy stonecrop, is a hardy herbaceous succulent forming neat clumps of fleshy blue-green leaves topped by broad, flat flower heads that shift from pale bud to rich rose in late summer. It is one of the easiest, most forgiving plants you can grow.

Light

Give sedum full sun for the sturdiest, most self-supporting clumps and the best flower color. In full light the stems stay compact and upright. Grown in shade or too little sun, the clumps flop open in the center and lean outward, and flowering is reduced. A hot, bright spot is ideal.

Water

Water sparingly. As a true succulent, sedum stores moisture in its thick leaves and is very drought-tolerant once established. Let the soil dry thoroughly between waterings and err on the side of too little rather than too much. Soggy soil is the surest way to cause rot, so overwatering is the main risk with this plant.

Soil & Potting

Sedum needs sharp, free-draining soil and thrives even in poor, gritty, or sandy ground. Heavy, moisture-retentive soil is its enemy. In containers use a gritty cactus or succulent mix, or amend regular potting soil generously with coarse sand or perlite, and always use a pot with drainage holes.

Humidity & Temperature

This is a hardy plant that copes with a wide range of temperatures and shrugs off cold winters, dying back to the ground and returning in spring. It prefers dry air over humid, stagnant conditions and appreciates good airflow. Excessive humidity combined with wet soil encourages fungal problems.

Feeding

Sedum needs very little feeding and actually grows best in lean soil. Rich soil and generous fertilizer produce tall, weak, floppy stems that splay apart. Skip feeding entirely, or give at most a light dose of a balanced fertilizer in spring on very poor soils.

Propagation

Sedum is exceptionally easy to propagate. Divide established clumps in spring, replanting the vigorous outer sections. Stem cuttings root readily when inserted into gritty soil, and even individual leaves laid on the surface will often form new plantlets. Spring and early summer are the best times to take cuttings.

Repotting / Pruning

Divide crowded clumps every few years in spring to keep them vigorous and prevent the centers from opening out. To combat floppiness in rich or shaded conditions, cut the stems back by about half in early summer for a shorter, denser plant. Leave the dried flower heads standing over winter for structure, then cut the old stems to the ground in late winter before new growth appears.

Common Problems & Pests

The classic problem is stems flopping open at the center, caused by too much shade, too much water, or overly rich soil. Root and stem rot follow from wet, poorly drained conditions. Pests are few, though aphids may cluster on new growth and mealybugs can appear on stressed plants. Correct the growing conditions and most issues resolve themselves.

Seasonal Care Tips

In spring, divide clumps and clear away last year's cut stems as new rosettes emerge. Early summer is the time for the optional cut-back to control height. Through summer, water only in extended dry spells. In autumn enjoy the flower color that draws pollinators, and leave the seed heads standing for winter interest before the late-winter tidy-up.