Hosta Robert Frost will form a significant mound, reaching heights of 50cm-60cm and spreading up to 125cm at maturity. In spring, it is particularly striking with its frosty blue-green leaves edged with a yellow margin. By late summer, the foliage transitions to green with streaky white margins. Characterised by its erect habit and ability to form a substantial clump.  The Hosta produces pale lavender, nearly white flowers on tall scapes, growing up to 90cm in height, from July to August. It is slug resistant and sun-tolerant.