Plant Profile: Cerastium tomentosum

Snow-in-summer is a low-growing perennial that develops into a dense mat of slender leaves, reaching about 6 inches in height. It spreads through underground runners. During late spring to early summer, stems adorned with striking star-shaped white flowers rise 8 to 12 inches above the foliage, with each stem capable of producing as many as 15 blooms. The abundance of flowers creates a stunning white carpet, which is the origin of its common name.

If the faded blooms are not removed, the plant will self-seed. It is advisable to divide the plants every few years during spring or fall. Additionally, propagation can be achieved through cuttings taken in early summer. Pruning should be postponed until spring, as it is not recommended in the fall.

In terms of pests, diseases, and other issues, root rot may develop in areas lacking proper drainage. This plant does not withstand foot traffic well and can become invasive in cooler summer climates. It has a relatively short lifespan, which may lead to bare patches in covered areas. Furthermore, it struggles in high humidity environments or in locations that do not receive adequate sunlight.