Rapini or Spring Raab Broccoli Seeds Heirloom Vegetable. A traditional Italian variety producing both tender young leaves and flowering shoots with tiny broccoli-like florets. Both the leaves and the heads can be eaten together creating a robust flavour that will dazzle your taste buds and leave you looking for more. By carefully picking young leaves, stems and flower buds, the harvest period can be spread out ove 2 to 4 weeks.