How deep do I plant my Eucomis bulbs ?

Plant bulbs 15cm (6in) deep, in fertile, well-drained soil, in full sun. The top of the bulb should be just below soil’s surface.

From RHS website.

I usually go for x2 depth of the size of the bulb.. I left mine out in the soil the year before last and they were good but whether they have survived the snow this winter i will just have to wait and see. funny enough it was RHS advice i was following. id bought the bulbs at Harlow Carr RHS garden and got advice on the day.