Crimson Clover Trifolium incarnatum is a beautiful seasonal addition to a flowering lawn if you are okay with letting it grow at about one foot tall. Grows well in just about any type of well-drained soil, especially sandy loam. It is highly attractive to pollinators and fixates nitrogen to improve soil conditions and support the grass and other flowering plants in your lawn. Annual in zones 5 or colder but has the potential to reseed itself.
