Hosta Firn Line will produce a small to medium sized mound at maturity with 18"-22" in height and 18"-30" in width. This absolutely stunning,Hosta has thick, heart-shaped, intense blue leaves with a wide, creamy margin that matures to pure white. Pale lavender flowers appear on long scapes of 24" in early summer. Sport of 'First Frost' that is very similar to 'Blue Ivory' and 'Great Escape'. Heart-shaped blue-green leaves have wide white margins that really shines in the garden. The contrast of the leaves really grabs your eye from a distance. Slug Resistant Hosta. This is probably one of the most stunning Hostas in my collection, when it gets to maturity. Protect from afternoon sun to prevent scorching.