Maybe you do not know this plant, so I'll tell you about it. It's an herbaceous perennial, gray because of dense pubescence. I like that it forms dense cushions. It has creeping shoots, flower stalks are15-20 cm tall. Lily leaves are small, silvery.
The flowers are white up to 1.5 cm, petals are deeply cut into two parts at the top. In our climate chickweed blooms in May and June 25-30 days. The fruit is cylindrical box with numerous teeth upstairs. In landscape design it is used since 1820.
If you do not want it to spread through your garden, simply remove the new shoots. In my garden it is not spreading but rather can be lost from frost and thaw. I do not cover it for wintering only prune heavily frosted ends of shoots in spring.
Does chickweed grow in your garden? Where do you use it: in a rockery, a flowerbed, or in hanging baskets?