Do Helianthus come back every year?
Although the annual sunflower (Helianthus annuus) is easy to grow from seed, they must be replanted each year. The genus Helianthus also includes a number of perennial species. These are fairly long-blooming, late-season flowers, blooming in late summer through mid autumn. Do you deadhead Helianthus Sunsation? Remove wilted flowers regularly (deadheading). Do sunflowers come back … Lire la suite