Lamium (deadnettle) is a genus of about 40-50 species of flowering plants in the family Lamiaceae, of which family it is the type genus. They are all herbaceous plants native to Europe, Asia, and north Africa, but several have become very successful weeds of crop fields and are now widely naturalised across the temperate world.

The genus includes both annual and perennial species; they spread by both seeds and stems rooting as they grow along the ground.

Lamiums are frost hardy and grow well in most soils. Flower colour determines planting season and light requirement: white- and purple-coloured flowered species are planted in spring and prefer full sun. The yellow-flowered ones are planted in fall (autumn) and prefer shade.

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