The best blue hosta UK gardeners can grow is Halcyon. This cultivar was bred in England as a Tardiana hybrid by Eric Smith at Hadspen House in Somerset. It thrives in the cool, cloudy British climate and holds its blue color longer than most other varieties you can find. You get a plant that was made for your growing conditions from the start. No other blue hosta has stronger ties to British soil than this one.
In my experience, the UK climate gives you a huge advantage with blue hostas. Your cooler summers, higher humidity, and cloudy skies all help preserve the waxy coating. Gardeners in warmer countries struggle to keep blue hostas looking good past June. In Britain, you can enjoy deep blue foliage well into August. Some shaded gardens in the north even hold the color into September. That extra time is a real bonus that gardeners in hotter climates would envy.
The reason UK conditions work so well comes down to the wax layer on each leaf. Lower summer temps mean less heat stress on the coating. Overcast skies cut down on UV damage that strips the blue away. Higher humidity keeps the wax from drying out and cracking. The natural rainfall in most of Britain stays gentle enough that it does not blast the wax off like a heavy sprinkler would. Blue hostas for British gardens have every advantage built right into your local weather patterns.
The Halcyon hosta UK gardeners love is just one of several great blue varieties bred at Hadspen House. Eric Smith created a whole group of Tardiana hybrids there that are fine-tuned for British conditions. Blue Moon gives you a compact plant with thick, round leaves in a deep blue tone. Dorset Blue stays small and works well at the front of a border or in a container. Hadspen Blue offers larger leaves with strong color and a classic hosta shape that fills in fast. All four of these were born in English soil and do their best work in that same climate.
Beyond the Tardiana group, you have other strong options that do well across the UK. Abiqua Drinking Gourd holds its dark blue color thanks to thick, cupped leaves. Blue Mammoth gives you a bold statement plant with massive foliage that fills a shaded corner fast. Both handle the British climate with no trouble at all. You can mix them with the Tardiana types to build a blue hosta collection that stays colorful from spring through late summer in your garden.
For the best results in your British garden, plant your blue hostas in a woodland setting under deciduous trees. This matches the natural growing style that most UK shade gardens follow. Take advantage of your natural rainfall and skip the overhead sprinklers. Rain in Britain tends to fall softer than irrigation water. This helps protect the wax on your leaves. Water at the base with a can or hose only during dry spells in summer. Most years you won't need to add much water at all beyond what the sky gives you.
Add 2 to 3 inches (5 to 8 centimeters) of leaf mold or bark mulch around each plant. This keeps your soil cool and moist the way blue hostas like it. Feed with a balanced slow-release fertilizer in April and again in late May. Expect your blue color to last well into August with these steps in place. Your UK growing conditions do most of the hard work for you. The right variety in the right spot is all you need to grow some of the bluest hostas anywhere in the world.
Read the full article: Blue Hosta Varieties and Growing Guide
