| The genus Sempervivum includes succulent rosettes of many different colors, sizes and textures. S. arachnoideum 'Spumanti' is a selection that has the typical cobweb appearance of the spider semp and grows in a crowded clusters of small rosettes that look like bubbles to us! Looks great in a container. Grow all semps in full sun to partial shade in gritty, well-drained soil. Water sparingly. One of the easiest of all plants to grow in rock gardens, crevices and walls, and containers. Thrives with neglect. Hardy to –20 degrees F. Crassulaceae |