Jumbo Crocus (C. vernus) - Larger than the botanical crocuses, "Jumbos" make a splash of early spring colour. Plant in your lawn, between shrubs, in borders, or in patio containers. They bloom a few weeks after the botanical crocuses - mixing both will create a long-flowering carpet of colour! Flowers February-March. Height 10cm. Yellow Mammoth - Big, sunbeam-yellow blooms to light up your spring garden. Bulb size 8-9cm. (Bulb sizes quoted in centimetres refer to the circumference of bulbs. All bulbs are sourced from cultivated stocks.) Crocuses are among the first heralds of spring. Their cups of vivid colours make such a welcome splash of colour that you’ll just want to keep planting more and more. A magnet for bees in early spring!