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Everything You Need to Know About Blue Hosta

Published on June 28th 2021
Decorative hosta leaves with rain drops by Anita Kuznetsova (All rights reserved)
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The Hosta genus is a group of plants comprising 70 herbaceous perennial species. The plant group originates from East-Central Asia but is now grown worldwide for its lush foliage and elegant blooms.
Hosta's foliage grows in dense clumps, with leaves often marbled with white variegation. Other desirable foliage colours include forest green, bright yellow and blue-grey.
Learn more about Hosta plants below:
A close up of a flower garden

Hardy's Top 10 Spring Flowers for Pollinators: Add Hosta to Brighten Up The Shadiest of Shady Spots


A green plant in a garden

The Hosta Collection

To learn more about the wondrous world of Blue Hostas and how to grow them successfully - keep reading.

What is a Blue Hosta?

Hosta plants boast impressive, showy foliage and elegant, tubular flowers. They're a popular choice with gardeners due to their easy of care properties, and most importantly, they're the perfect plant for shaded gardens.
With the colour blue-grey being on-trend for interior design throughout 2021, the cool and sophisticated colour has made it into the garden, too.

What makes Blue Hostas blue?

The colour seen in the leaves of blue Hostas is a result of the waxy protective coating that is produced by the plant.
Blue Hostas become bluer with maturity. However, there are periods of the year where naturally, the desirable blue colour might fade due to increased rainfall and sunlight. This is entirely dependent on the location of your garden and its conditions.

Why do blue Hostas turn green?

If you'd like to grow a blue Hosta, choose an area of the garden protected from the sun. If these plants are exposed to the sun during prolonged parts of the day, the blue, waxy coating will melt. Heavy rain can also contribute to eroding the waxy leaf coating. In doing so, the green colour of the leaf becomes more visible.

Do blue Hostas prefer sun or shade?

Most blue Hostas require partial to full shade. This is pivotal for maintaining their cool, blue-grey colour.

The best blue Hostas for shaded gardens

How to keep blue Hostas blue

As it is only a light layer of wax that gives these Hostas their subtle blue hues, it's only natural that this will erode over the course of the year through natural causes. Rain and heat can have a huge impact, although in most cases, the waxy layer will persist if you keep your plant healthy and support vigorous growth through feeding and pruning.
Tools for trimming back Hostas:

How to grow blue Hostas

Good news - most Hostas are considered easy-care plants, and they're container friendly too! As mentioned, they only need a touch of light (morning or dappled sun) and preferably should be planted in a shady spot. The soil should be kept nice and moist, and don't be afraid to use manure or plant feed to keep the soil rich in nutrients.
Slugs and snails are probably one of the biggest problems associated with Hostas. It is always best to try and deter these pests naturally where possible. Hand removal is one of the most effective methods. Firstly, plants should be checked on rainy and cloudy evenings and then the following morning, because this is when slugs are most active.
Why not help out garden wildlife and drop slugs and snails in a pile at the back of the garden for wildlife to feast upon? Make sure these are a good distance away from your most prized plants!
Similarly, incorporating a wildlife pond in your garden provides habitat for frogs and toads, which can help to keep slug and snail populations under control.
Hedgehogs are also an important predator of slugs. Learn tips on how to make your garden more hedgehog friendly below:

What to plant with blue Hostas

You can make your blue Hostas pop by combining them with contrasting textures. Ferns would be a firm favourite here. Like Hosta, most ferns thrive in cool shady spots, and when planted together, they look stunning.
Other plants to consider planting along blue Hosta includes Bleeding Hearts (Dicentra spp.), Solomon’s Seal (Polygonatum spp.), Sedges and Mondo grasses (Carex spp.) and Toad Lilies (Tricytris spp.).

Signs your Hosta isn't doing well

  • Browning on the tips or outside edges of leaves.
  • Leaves start to look dull in colour or develop faded spots.
  • The blue colour fades.
If you think your Hosta isn't happy, check the soil and consider the light levels it is receiving. There might be a more suitable place to replant your Hosta.

Blue Hosta blooms

Although Hosta is grown particularly for their foliage, they can produce attractive blooms too. Hosta flowers are tubular in shape, making them a great source of nectar for moths. In the case of blue Hostas, the flowers can be pale blue, purple or pink.
A close up of a flower

What is the largest blue Hosta?

One of the largest Hosta plants based on the size of leaf and overall plant size would be the 'Empress Wu' cultivar.

Where to buy Blue Hostas:

You can shop the full range of Hostas in the Bali-Hai Nursery online shop!