Perennial Nine Star Broccoli – Brassica Oleracea Botrytis Asparagoides. Is an amazing hardy vegetable that produces a central large creamy white cauliflower type head with a myriad of sprouting side shoots from as early as February through to May. To keep the plants sprouting year after year you have to cut off all the florets for eating and any flowers that try to emerge so you don’t allow the plants to go to seed.