Waterthyme, a common water plant, is fairly easy to grow. It thrives in aquatic habitats, with plenty of light for photosynthesis, and can withstand various water conditions and temperatures. Soil isn't required as waterthyme gets nutrients directly from water. Common challenges posed include susceptibility to pests like waterthyme leafminer and diseases such as fungal infections. Waterthyme can also pose an environmental threat due to its aggressive invasive nature. Seasonally, its growth rate varies, slowing in winter and increasing in spring, summer, and autumn.