Yes. Most alpines grow back every year, and the same plants in your trough or rockery reappear each spring without any replanting on your part. Watch a planted trough over a few seasons and you see the same cushions and mats push out fresh growth as the weather warms. They do not just survive either. Each clump slowly spreads wider and fills more of the gravel around it with every passing year.
This comes down to their life cycle. People often ask are alpines perennial, and the answer is a firm yes. The vast majority live for many years rather than dying off after one season. A true perennial keeps its roots and a base of growth alive through winter, so the alpines grow back from that same plant. Only a small handful of alpine fillers are annuals, and those you sow fresh each year. Everything else you plant should still be there long after you have forgotten the labels.
The biology behind this is simple once you see it. Alpines hold their growing points, called meristems, at or just below the soil surface where frost and wind cannot reach them. Through winter these points sit dormant as perennating buds, tucked low and protected by gravel, old leaves, or a thin cap of snow. When spring arrives the buds wake up and send out new shoots from the very same crown. The visible cushion may look brown and dead in February, but the engine for next year is alive underground the whole time. This is why you should never dig out an alpine that looks bare in winter, since most are simply waiting for warmth to return.
These plants take this staying power to an extreme in the wild. Some alpine clones live far longer than any garden shrub or tree you could name. Sedge clones of Carex curvula in the high Alps are thought to be around 2,000 years old. That single plant has grown on as one slow ring for two whole millennia. Your garden alpines will not match that age. But the same engine for regrowing year after year is built into every one of them. It is the reason a small plug you set in gravel today can outlive the trough it sits in.
Cold is rarely what stops an alpine coming back. These are hardy alpine plants built for mountain winters with deep frost and weeks of snow. A normal garden freeze does them no harm at all. The real threat is winter wet. Heavy soil that stays soggy around the crown lets rot set in. A rotted crown cannot regrow no matter how mild the rest of the season turns out. So when alpines fail to grow back in spring, soggy roots are the reason rather than the temperature. Up on a mountain that water would drain off through scree in minutes, and that fast runoff is the condition you want to copy at home.
So drainage is the one thing that keeps a perennial alpine going for years. Plant into a gritty mix with plenty of sharp sand or fine grit mixed through the soil. Then add a top layer of gravel around each plant so water runs away from the crown fast. That collar of stone keeps the neck of the plant dry even after heavy rain. Raised beds, troughs, and rockeries all work for the same reason, since they shed water quickly instead of holding it. Get the drainage right and your alpines come back stronger and wider every single spring, year after year.
Read the full article: Alpine Plants: A Complete Grower's Guide
