A Guide To Planting Trees Near Your Septic System

Planting trees and shrubs near your home can enhance its aesthetic appeal and provide environmental benefits.

However, it's crucial to proceed cautiously when it comes to planting near your septic system.

Certain species, especially the worst trees for sewer lines, can significantly threaten your septic system's integrity.

On the other hand, shrubs with non-invasive roots can be a safer choice.

Homeowners often wonder if tree roots can damage sewer pipes. These concerns are valid, as improper planting near sewer pipes can lead to costly repairs.

Choosing the best trees to plant near sewer pipes, especially with PVC pipes, requires careful planning and knowledge. 

What Are The Risks Of Planting Trees Near Sewer Lines?

Planting trees near sewer lines can pose several risks, not only to the septic system itself but also to the environment and the safety of household members.

• For the Septic System: The primary concern is the potential for root intrusion. Tree roots, particularly from species known as the worst trees for sewer lines, can aggressively grow towards and into sewer pipes. This intrusion can lead to blockages, cracks, and even complete collapse of the sewer pipes. 

• Environmental Risks: Tree roots disrupting sewer lines can lead to sewage leaks, contaminating the surrounding soil and groundwater. This contamination harms local ecosystems and can contribute to broader environmental problems like water pollution.

• Risks to House Members: The consequences of damaged sewer lines extend to household members, too. Sewage backups caused by root intrusion can lead to health hazards within the home, exposing residents to harmful bacteria and unpleasant odors. 

Factors To Consider Before Planting Near Sewer System

• Distance: Plant trees at least 20 feet from septic components, especially for larger species, to reduce the risk of root intrusion.

• Root Growth Patterns: Avoid trees with aggressive roots like willows or poplars, which can invade septic systems. Choose trees with shallow or non-invasive roots.

• Soil Type and Moisture: Well-draining soil can encourage roots to spread, while clay-heavy soil may trap moisture or attract roots closer to the septic system.

• Tree Size at Maturity: Consider the tree’s full-grown size, as larger trees generally have broader and deeper roots or pose a greater risk to septic systems.

• Climate and Water Needs: Trees needing high moisture might extend roots to the septic system for water, so drought-tolerant species should be selected to minimize this risk.

Septic-Safe Trees and Shrubs

• Dogwood Trees: Dogwood roots are shallow and noninvasive, so it is safe to plant them near septic tanks. They also bring lovely spring flowering and stay short.

• Japanese Maple Trees: The small ornamental trees have less troublesome roots, which lessen the chances of damage to the septic area. They do well in semi-shade and are nice colors for your yard.

• Eastern Redbud Trees: Redbuds are considered safe because they have moderate root growth and bring color during spring. They are compact and hence suitable for such areas close to septic tanks.

• Cherry Trees: With their controllable roots and attractive flowers, including in spring, Cherry blossom trees are less likely to damage sewage pipes and fit handsomely in the gardens.

• Azalea Shrubs: These are short shrubs with shallow-rooted systems that pose no threats to septic systems. Azaleas enhance greenery and contribute to the seasonal structures of flowers of different colors.

• Boxwood Shrubs: Boxwoods possess small, shallow roots that tend to remain in the upper soil layers, making them perfect for planting close to septic tanks without fear of root encroachment.

• Holly Shrubs: Hollies have non-invasive root systems and provide a year-long green color through their leaves, creating minimal risk to septic systems.

Trees To Avoid Planting Near Sewer Lines

When landscaping near sewer lines, certain types of trees should be avoided due to their aggressive root systems.

Notably, willows, poplars, and large species of maples are among the worst trees for sewer lines. These trees have extensive root networks that can quickly invade and damage PVC pipes and other sewer line materials. 

Additionally, oak and elm trees are known for their invasive roots, which pose a significant threat to the integrity of sewer systems. It's essential to be cautious with these species to prevent potential damage to underground utilities.

How Far Should Trees Be From The Septic Tank?

When planning your septic tank in the backyard, it's crucial to consider the distance of trees from the tank. A general rule of thumb is that the distance should at least equal the tree's mature height. 

For instance, a tree that is expected to grow 20 feet tall should be planted at least 20 feet away from the septic tank. This precaution helps to minimize the risk of root intrusion and ensures the safety and functionality of your septic system.

How Close To A Septic System Can You Plant Trees?

Roots creeping into septic systems or drain fields can be avoided if trees are positioned at least 20 feet away.

However, a more extensive distance, like 50 feet, may be needed for the larger species with aggressive rooting, such as maples or willows, as their roots can disrupt extensive areas. 

Smaller species, however, with noninvasive rooting, can be positioned closer, even 10-15 feet, but careful consideration must be made for tree type and soil conditions.

What Are The Best Practices For Planting Near Sewer Pipes?

Adhering to best practices is essential for minimizing risks when planting near sewer pipes.

Choose plants with shallow root systems, such as small shrubs or grasses, to reduce the chance of root intrusion. It's advisable to keep all trees and shrubs, regardless of their size or growth rate, at least 10 feet away from your sewer lateral. 

If the tree has spreading roots or requires substantial water, it should be planted at least 20 feet from underground pipes or utility lines. This careful spacing helps prevent root intrusion and minimizes the risk of damage to your sewer infrastructure.

What Can You Plant Near Sewer Pipes?

When considering what to plant near sewer pipes, especially over drain fields, opting for shallow-rooted plants is key. Grasses and small, non-invasive ground covers are ideal, as they pose minimal risk to underground systems. 

For instance, ornamental grasses, clover, or creeping thyme can be safely planted. Choose varieties with non-invasive roots, like boxwood or holly, if you prefer shrubs. These plants help stabilize the soil without endangering the sewer pipes beneath.

Avoid deep-rooted trees and large shrubs to ensure the safety and functionality of your sewer system.

Final Thoughts

The key to successful landscaping near sewer lines is carefully planning and selecting the right plants. Remember, the distance from trees to sewer lines is crucial, with a general rule of keeping a space equivalent to the tree's mature height. 

By following these best practices, you can enhance your property's beauty without compromising the functionality of your sewer system. 

Our expert team at Barnes Sewer & Septic provides guidance, and services are tailored to your specific needs (765) 584-7295. 

Let's ensure your landscaping decisions are beautiful and safe for your home's essential systems.