Rudbeckia Seeds - Goldsturm98 105 days. Goldsturm rudbeckia seeds promise an award winning and European twist to a classic American bloom. Goldsturm seeds grow robust 24 36 tall rudbeckias brimming with dazzling 3 blooms of golden yellow petals around a coned chocolate center. Rudbeckia Goldsturm is a German hybrid crossed with the traditional American Black Eyed Susan and recipient of the Award of Garden Merit by the Royal Horticultural Society and named Plant of the Year by