is sunflower plant perennial
Perennial sunflower is a crop of sunflowers that are developed by crossing wild perennial and domestic annual sunflower species.Annual sunflower is a major oilseed crop. Genes from wild perennial relatives may increase root depth and mass and extend the growing season.erennial sunflower is a crop of sunflowers that are developed by crossing wild perennial and domestic annual sunflower species. Annual sunflower is a major oilseed crop.