Does Blue Arrow Juniper Have Invasive Roots?

Are you wondering if planting a Blue Arrow Juniper in your landscape might cause problems due to invasive roots?

Many garden enthusiasts want to ensure that their chosen plants will not harm surrounding structures or other vegetation.

Let's find out if Blue Arrow Junipers roots are invasive in this guide.

Getting to Know the Blue Arrow Juniper

The Blue Arrow Juniper (Juniperus scopulorum) is a species of coniferous evergreen trees from the Cupressaceae family, known for their attractive blue-green foliage, and narrow, upright structure.

Blue Arrow Juniper tree in the garden

Native to the Rocky Mountains, they thrive in full sun to partial shade and adapt well to various soil types.

As a fast-growing tree, it can reach heights of 12-15 feet and has a spread of 2-3 feet.

The compact shape makes it an excellent choice for a focal point or as a privacy screen in your outdoor space.

Are Blue Arrow Juniper Root Invasive?

One concern that you may have when considering adding a Blue Arrow Juniper to your landscape is whether it has invasive roots.

Fortunately, this tree's root system is generally non-invasive, meaning it is less likely to damage sidewalks, foundations, or underground utilities.

Since they are not known to cause damage with invasive roots, they make a safe and visually appealing addition to your garden or landscape.

Junipers typically have a shallow and wide-spreading root system that helps anchor the plant in the soil.

As the plant matures, most of its roots will be found within the top 6-12 inches of soil, enabling it to capture water efficiently.

You may notice some more extensive, anchoring roots extending deeper into the ground, but these roots are not considered invasive.

Juniper Species with Invasive Roots

Now, it's worth noting that some species of juniper can be invasive, particularly in certain regions.

For example, Eastern Red Cedar (Juniperus virginiana) is an invasive species in parts of the United States.

However, these invasive traits are generally not attributed to Blue Arrow Juniper, which is a cultivar of the Rocky Mountain Juniper (Juniperus scopulorum).

When discussing invasive plants, it's also important to consider how they spread.

In the case of Blue Arrow Juniper, it does not produce large amounts of seeds, which can then be dispersed by birds, like some other invasive species.

This makes it less likely to spread uncontrollably and become a problem in your garden.

Impacts on Surrounding Flora

The roots of Blue Arrow Juniper are not considered invasive. They are moderately spreading, which means they generally stay within the area of the plant's canopy.

This is good news because it means that the juniper's roots are unlikely to encroach on your other plants or cause damage to nearby structures.

Blue Arrow Junipers planted in Box planters in the garden

However, there are still some factors to consider when planting your Blue Arrow Juniper.

For example, junipers are susceptible to twig blights, which are caused by fungi such as Phomopsis and Kabatina. These fungi can infect not only junipers but also other plants in your garden.

To reduce the risk of fungal infection, make sure you provide sufficient space between your Blue Arrow Juniper and other plants.

In addition, it's essential to be mindful of your plant's water requirements.

Blue Arrow Juniper prefers well-drained soil and can tolerate some drought.

If you place it next to plants that require a lot of water, you may unintentionally create conditions that won't suit your juniper and lead to poor growth or disease susceptibility.

Preventative Measures Against Invasiveness

Firstly, make sure to plant your Blue Arrow Juniper in an appropriate location.

Since this plant can grow up to 12-15 feet tall and 2-3 feet wide, provide ample space for expansion.

Having adequate space will limit the possibility of roots spreading into unwanted areas.

Secondly, monitor the growth of your juniper regularly. Prune any excessive growth as needed, and remove any suckers or seedlings in the surrounding area.

By keeping a close eye on the growth of your plant, you can easily detect any unwanted spread and address it before it becomes a problem.

Finally, maintain a healthy ecosystem and proper care for your Blue Arrow Juniper.

This includes watering, fertilizing, and pest management. When a plant is well-maintained, it's less likely to become invasive.

How Far Do the Roots of Blue Arrow Juniper Spread?

While the Blue Arrow Juniper is known for its narrow, upright growth habit, you might be curious about how far its root system spreads.

Although specific information on the Blue Arrow Juniper's root spread isn't readily available, we can look at some related species for a general idea.

For instance, the Rocky Mountain Juniper is a slow-growing tree reaching 30-40 feet tall.

It's important to note that while their heights might be similar, their growth habits may differ, and their root systems may not be exactly the same.

Most trees, including junipers, have a root system that extends beyond the drip line (the outermost circumference of the tree canopy).

This means that the roots of Blue Arrow Juniper will likely spread out at least as far as the width of its branches, if not more.

It is also important to consider the soil conditions, as roots may grow farther in search of water and nutrients if the soil is poor.

To ensure your Blue Arrow Juniper has room to grow and establish a healthy root system, plant it at least several feet away from structures, sidewalks, and other plants.

This will also help prevent any potential root-related problems.

Can Blue Arrow Junipers be Planted Close to a House?

Blue Arrow Junipers typically don't have invasive root systems, which makes them a suitable option when considering plants to add near your house.

Before making a decision though, it's essential to consider a few factors. First, the ideal growing conditions for Blue Arrow Junipers include full sun and well-drained soil.

Make sure the area you choose for planting provides these conditions to ensure the health and longevity of your juniper.

Also, keep in mind that this evergreen tree can grow up to 15 feet tall and 2 to 3 feet wide.

So you'll want to provide enough space for it to grow without interfering with your home or other structures.

To avoid any potential issues, it's recommended to plant your Blue Arrow Juniper at least 5 feet away from your home or any utility lines.

Blue Arrow Junipers Have Non-invasive Roots

Blue Arrow Junipers do not have invasive roots, making them a suitable choice for your landscaping needs.

They provide year-round beauty and serve as an excellent accent plant or privacy screen.

With proper care and maintenance, your Blue Arrow Juniper can be a stunning and worry-free addition to your outdoor space.

For more tips of growing Junipers, check here:

The Ultimate Guide to Wintering Juniper Bonsai

4 Tall Box Plants: Choosing, Growing, And Maintaining These Privacy Shrubs

One comment

  1. Have blue arrows in our yard , 2 are planted within a foot of 2 raised garden beds, when digging down in my 2 foot beds a massive root structure appears about a foot below the beds, or about depth of a normal shovel. There is no other plants around boxes. I am in rocky sandy soil hot in summertime [okanagan b.c] trees and boxes on a metering timed wat e ring system. Yes they are very invasive. One garden box 12 feet long, tree is close to the end, lots roots, no roots on other half yet. But yes I have a problem and a bad one

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