Of all the blue hyacinths, this is surely the best. The large heads are the softest sky-blue. OUTDOOR VARIETY. Flowers March-April. Height 25cm. Bulb size 15/16cm. (Bulb sizes"ed in centimetres refer to the circumference of bulbs. All bulbs are sourced from cultivated stocks.) Please note: Handling hyacinth bulbs may cause temporary itching.