The pros and cons of sedum come down to a simple tradeoff. You get a drought-tough, low-care plant that thrives on neglect. But you also get a plant that rots in wet soil and can spread where you don't want it. Knowing both sides helps you decide if sedum fits your garden.
I planted a mix of creeping sedum in my rock garden five years ago and haven't watered it once since. The plants filled in the gaps between stones, bloomed each summer, and looked great through fall. But Dragon's Blood crept out of the rock garden and into a neighboring flower bed within two seasons. I spent a whole afternoon pulling runners out of my daylilies.
The sedum benefits all trace back to its CAM photosynthesis. This process lets the plant open its pores at night instead of during the hot day. It loses far less water than most garden plants. That's why sedum survives drought, poor soil, and baking heat that would kill your petunias. But CAM also means sedum grows slower than many garden plants. In rich, moist soil, faster-growing neighbors can crowd it out.
Drought Tolerance
- Pro: Sedum survives weeks without rain once it gets going, making it perfect for xeriscaping and water-wise gardens that you don't want to babysit.
- Pro: Your water bill drops when you replace thirsty plants with sedum, saving you both time and money over a full growing season.
- Con: This same toughness means sedum rots fast in soggy or clay-heavy soil where water pools around the roots after rain.
Low Maintenance Needs
- Pro: You don't need to fertilize, deadhead, or fuss over sedum since it thrives on lean soil and benign neglect from you.
- Pro: Deer and rabbits leave sedum alone in most gardens, so you skip the fence-building and repellent sprays other plants demand.
- Con: Some creeping varieties spread 2-3 feet per year and will invade paths, lawns, and neighboring beds if you don't set boundaries.
Wildlife and Design Value
- Pro: Late-blooming varieties like Autumn Joy attract butterflies and bees in fall when few other flowers remain to feed pollinators.
- Pro: Sedum works on green roofs, rock walls, and gravel gardens where most plants can't survive the harsh growing conditions at all.
- Con: Most species perform poorly in shade, giving you limited options for north-facing beds and spots under trees.
The sedum disadvantages are real but manageable if you plan ahead. Use plastic or metal root barriers around aggressive creeping types to keep them inside their zone. Amend clay soil with coarse sand or gravel before planting so water drains away from the roots. And if you have a shady spot, choose S. ternatum instead of forcing a sun-loving variety to struggle.
Your success with sedum depends on putting it where its strengths shine and its weaknesses don't matter. A dry sunny slope is sedum heaven. A wet shady corner is sedum disaster. Match the plant to the conditions and the pros will far outweigh the cons in your garden for years to come.
Read the full article: Sedum Plant Care and Growing Guide
