 Lambsquarters have three types of seeds, large seeds that germinate immediately upon being shed, smaller seeds that remain dormant through winter and germinate the following year, and the smallest seeds that remain dormant and germinate in their third year. The plant is a host for leafhoppers and leafminers, which are terrible pests of beets, spinach, and chard. Another annual weed is redroot pigweed. Although it's an annual, controlling it can be as difficult as perennial quackgrass and fieldbindweed.