Houseleek In many parts of Great Britain it is still believed that houseleeks growing on the outside walls and/or roof of a house bring phenomenal good luck to all inhabitants of the dwelling. However, should you purposely or accidentally cut down a houseleek,you will suffer a streak of bad luck, especially where your house is concerned. Houseleeks are also said to protect a house against lightning strikes, fire, and tempests. For this reason, it is traditional for many folks upon moving into a new home to plant them as close to the house as possible before doing anything else. It is also very common for many Welsh families who dwell within thatch-roofed cottages to plant houseleeks upon their rooftops for good luck. [Source: Gerina Dunwich - Herbal Magick]