1,000+ Seeds of Purple Top Turnip. An easy to grow plant from purple top turnip seeds used for forage and cover crops. This turnip is white and purple that has smooth, globe roots take about 55 days to reach maturity. This plant has many great uses such as putting nutrients back into the soil as well as providing a food source for wildlife and livestock. They grow rapidly and are an excellent choice for fall grazing livestock and used widespread for deer food plots. This dual-purpose plant produces a large purple top spherical root and leafy foliage that can both be grazed. Because they provide a high-protein and high-energy food source, purple top turnips are one of the most popular food plot plants for whitetail deer as well as a general purpose cover crop.