The Powis Castle Artemisia (Artemisia X ‘Powis Castle’) Care Guide

The Powis Castle Artemisia, otherwise known as the Artemisia X ‘Powis Castle’ or Wormwood ‘Powis Castle’, Artemisia arborescens x Absinthium, Wormwood ‘Powys Castle’, Artemisia arborescens ‘Brass Band’, Artemisia arborescens ‘Powis Castle’, is a rather well known shrub plant by gardening enthusiasts around the world.

Best known for its low maintenance and moderate growth, this shrub will likely liven up your house (or garden) with its silver-green colored leaves. But, only if you learn how to take proper care of it for it to thrive.

This is why all the topics you need to know in order to achieve this will be covered in this Powis Castle Artemisia Care Guide. Ready? Let’s go!

The basic care guidelines you need to remember for your Powis Castle Artemisia are the following:

  • Water: The Powis Castle Artemisia needs at least weekly watering, or more in extreme heat, preferably with regular water.
  • Light: Keep your Artemisia X ‘Powis Castle’ in an environment where it can receive full sun on a daily basis. 
  • Soil: Make sure to keep the Powis Castle Artemisia in soil with well-draining properties, so ideally, one that is made of sand, chalk, and loam.

And as with many other plants, these are the only three care factors you need to remember to make sure your Powis Castle Artemisia is, for the most part, healthy and well to survive.

Powis Castle Artemisia branch

Scientific / Botanical Aspects

In botanical terms, the Powis Castle Artemisia belongs to the Asteraceae family, and the genus Artemisia, hence its scientific (or botanical) name Artemisia X ‘Powis Castle’ (ar-te-MIZ-ee-uh).

As with other Artemisia’s, the Powis Castle Artemisia is a herbaceous plant, which means it will die back to the ground every year. 

Growing Region

As a rule of thumb, we recommend to always keep in mind your plants’ native region and environment, since these are the conditions that your Powis Castle Artemisia is most accustomed to, thus where it can most favorably.

With this in mind, the Artemisia X ‘Powis Castle’ will be most used to the heat zones in the 8 – 11 region, and in climate zones that range between 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

Growth and Size


In terms of size and growth, the Powis Castle Artemisia is a relatively moderate grower, which makes things somewhat easy for any plant enthusiast.


But, how big does the Powis Castle Artemisia actually get? What should you expect in terms of size? Let’s dive right in…

The Artemisia X ‘Powis Castle’ can grow up to 2′ – 3′ (60cm – 90cm) in 2′ – 3′ (60cm – 90cm) and 3′ – 6′ (90cm – 180cm) in 3′ – 6′ (90cm – 180cm). 

These dimensions make the Powis Castle Artemisia a relatively medium shrub compared to others, so it’s best to keep this fact in mind since it will affect where you want to keep yours at home.

Also, expect it to grow in a wonderful mounding shape, which is something worthwhile to remember when making your garden landscape plans.

This is why experts recommend keeping an area of approximately 36″ (90cm) free so the Powis Castle Artemisia can spread to its best extent.


In terms of watering, the Powis Castle Artemisia is a fairly simple plant to take care of.

This is mostly because it has a straightforward watering schedule and somewhat regular watering needs.

Specifically, most experts agree that the Artemisia X ‘Powis Castle’ needs at least weekly watering, or more in extreme heat, preferably with regular water.

Which is why it is considered a plant with relatively average needs in terms of water. 

Powis Castle Artemisia care


As a rule of thumb, you should remember to keep your Powis Castle Artemisia in soil with well-draining characteristics, as these will guarantee the right conditions for your plant to grow and thrive. 

When you consider this, this is why you should aim to choose soil that has good drainage, and occasionally dry properties to keep the right moisture levels at all times. 

However, in our experience, the best solution to knowing the right amount of water for your Powis Castle Artemisia is with the ‘thumb’ technique. Basically, you insert your finger into the soil, and based if you feel the soil moist or dry, you determine if it needs any water, which is the most appropriate way to go about watering your leafy friend.

Soil Mix

As mentioned earlier, the Powis Castle Artemisia prefers to have soil with good drainage, and occasionally dry properties at all times, reason why you need to make the soil mix out of sand, chalk, and loam.

This is why most experts agree that the Powis Castle Artemisia requires soil with clay, loam (silt), and sand, which will give you the right conditions it needs.

In addition to this, expert gardeners recommend having preferably alkaline, acid or neutral soil.

Light and Exposure

In terms of light & exposure, the Powis Castle Artemisia requires full sun in order for it to thrive under the right conditions. 

Most experts agree that this shrub will do well as long as you keep it in full sun, and it will be able to grow properly.

Specifically, we recommend that you place your Artemisia X ‘Powis Castle’ in full and direct sun (more than 6 hours of direct sunlight per day).


Being a herbaceous plant, the Powis Castle Artemisia will die back to the ground every year. 

But, you can expect it to have its ‘prime-time’ during the spring (early, mid, late), the summer (early, mid, late), the fall, and during the winter.


The Powis Castle Artemisia produces some beautiful yellow, or gold/yellow flowers around this time of year.


The leaves from the Powis Castle Artemisia have a beautiful silver-green color during most of the year.

In particular, they have a alternate organization in its leaves.

You can expect the leaves from your Artemisia X ‘Powis Castle’ to be around (3-6 inches) in size.

Powis Castle Artemisia up close

Attracts, Tolerance and Resistance

The Powis Castle Artemisia is well known for its tolerance to dry soil, drought and animals like deer and rabbit, so don’t worry if any of these come along, your Artemisia X ‘Powis Castle’ will be fine.


Does your Powis Castle Artemisia have any garden recommendations? Does it serve any gardening purposes? Here’s how you can get the most out of your new plant.

Most Artemisia X ‘Powis Castle’ owners agree that this shrub will look great in most mediterranean, cottage and rustic gardens of all types. 

Other owners consider that they complement well most gardens of informal and cottage, gravel and rock garden, and in traditional garden styles. 

In particular, the Powis Castle Artemisia’s best location within your garden is in beds and borders, others use it for landscaping in a edging, border, mass planting, container, ground cover, or a rock garden.

Companion Plants

Powis Castle Artemisia’s do well with some other plants beside it. One good companion plant is the Echinacea, which will pair up nicely with your leafy friend.

Others consider that a nice Armeria will work well too, so choose whichever you find works best for you!


And we’ve come to an end. Fortunately, that’s everything you need to know about your Powis Castle Artemisia to keep it safe and sound in your garden or home. Enjoy planting!

Sebastian Moncada

I’m also a plant enthusiast and researcher. I’ve been privileged to have lived my whole life around the wilderness of Colombia and I’m happy to share everything I learn along the way. “Adopt the pace of nature. Her secret is patience” – Emerson.

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