Introduction
Have you ever wondered what plants are suitable for a septic mound? A septic mound is an essential part of any septic system that helps to purify wastewater and prevent groundwater contamination. However, not all plants are suitable for this type of environment. In this article, we will explore the best plants to plant on a septic mound to ensure the health and longevity of your septic system.
Understanding Septic Mounds
A septic mound system, in simple terms, is a raised or elevated drain field. It is a specialized setup used for treating wastewater when the soil conditions or limited space make a traditional drain field impossible. Instead of installing pipes underground, the septic mound involves building a raised mound using different layers of soil. This design helps filter and treat the wastewater more effectively before it seeps into the ground. By elevating the drain field, it ensures better drainage and prevents contamination of nearby water sources. Essentially, it’s a solution that helps treat and manage wastewater in areas with challenging soil conditions.
Benefits of Planting on Septic Mounds

Planting on septic mounds offers numerous advantages. Firstly, vegetation helps stabilize the soil, preventing erosion and maintaining the integrity of the mound structure. Additionally, plants play a vital role in absorbing excess moisture, reducing the load on the septic system and promoting effective wastewater treatment. Furthermore, a well-planted septic mound can enhance the aesthetics of your property, creating an attractive landscape feature.
Plants For Septic Drain Field: 10 Factors To Consider
A well-planned planting strategy on your septic mound or drain field can provide benefits such as enhanced wastewater treatment, soil erosion prevention, slope stabilization, improved aesthetics, and habitat creation. By choosing the right plants, you contribute to the overall health of your septic system and the surrounding ecosystem.
Planting on septic mound systems requires careful consideration of various factors to avoid damaging the system and ensure its longevity. Here are some critical factors to keep in mind when planting on septic mounds or drain fields:
1. Soil Conditions and Drainage Requirements
The soil composition and drainage characteristics of the septic mound are vital considerations when selecting plants. Different plants have varying soil requirements, and it is essential to choose those that can thrive in the specific soil conditions of the septic mound. Assess the soil’s texture, structure, and compaction to determine its drainage capacity.
2. Shallow-Rooted Plants
To prevent damage to septic systems, it’s crucial to plant shallow-rooted vegetation that won’t interfere with the pipes or leach field. Deep-rooted plants, such as willows and poplars, should be avoided as their roots can easily grow into the septic system, clogging the pipes and causing system failure. Shallow-rooted plants, such as herbaceous plants and some trees and shrubs, are better suited for septic mound systems.
3. Perennials Over Annuals
Perennials are a better choice than annuals for septic mound landscaping because they require less gardening, which means less soil disturbance. Disturbing the soil around the mound can damage the system and cause it to malfunction. Additionally, perennials provide year-round cover and don’t need to be replanted every year, reducing the risk of soil erosion.
4. Protective Gear
When working around septic systems, it’s crucial to wear protective gear, including gloves, to avoid contact with harmful bacteria and pathogens. Septic systems can contain hazardous waste, and proper protective gear can reduce the risk of infection or illness.
5. Avoid Digging Too Deep
It’s important to avoid digging too deep when planting on septic mounds as it can damage the system’s components. Instead, use shallow planting techniques to avoid disturbing the mound’s surface.
6. Don’t Add Too Much Soil or Mulch
Adding too much soil or mulch to the septic mound can interfere with the evaporation process, which is essential for the proper functioning of the system. Excess soil or mulch can prevent the soil from absorbing moisture, leading to system failure. Additionally, overwatering the plants can interfere with the system’s ability to drain properly.
7. Nutrient Levels
Ensure that the plants you choose can thrive in the nutrient levels present in the septic mound soil. Some plants are more adaptable to nutrient-poor soils, while others require higher nutrient levels. Select plants that can effectively extract nutrients from the soil and do not excessively deplete them.
8. pH Level
Certain plants may prefer acidic or alkaline soil conditions. Select plants that can thrive in the specific pH range of the septic mound.
9. What To Plant On Septic Mound: Effluent Quality
The quality of the effluent that is discharged into the septic mound plays a significant role in the growth and health of the plants. It is essential to ensure that the effluent quality is suitable for supporting plant life and to be mindful of the impact of household waste on septic mound plants. Harsh chemicals or substances should be avoided as they can harm the plants and alter the soil properties.
One common issue to be aware of is the use of detergents, fabric softeners, and other household effluents that can raise the alkalinity of the soil. These products often contain chemicals that can have detrimental effects on plant growth. When choosing cleaning products for your household, opt for environmentally friendly options that are safe for septic systems and do not contain harmful chemicals.
Additionally, be mindful of what you dispose of through your septic system. Avoid pouring excessive amounts of oil, grease, or toxic substances down the drain as they can contaminate the effluent and negatively impact the plants on the septic mound. Proper waste management practices, such as recycling and disposing of hazardous materials appropriately, can help maintain a healthy environment for the plants and the septic system.
Remember, the goal is to foster a symbiotic relationship between the septic system and the plants, where the plants benefit from the nutrients in the treated effluent, and their roots help stabilize the septic mound and enhance wastewater treatment. By being wary of how household waste impacts septic mound plants and taking appropriate measures, you can maintain a healthy and thriving ecosystem within your septic system.
10. What To Plant On Septic Mound: Climate Conditions
Consider the climate conditions of the area where the septic mound is located. Different plants have varying tolerances to temperature, sunlight, and humidity levels. Choose plants that are well-suited to the local climate conditions to ensure their survival and optimal growth.
By considering these factors, you can make informed decisions when choosing plants for your septic mound, ensuring their compatibility with the soil, drainage, nutrient levels, and overall functioning of the septic system.
Herbaceous Plants: Ideal for Septic Mounds
Herbaceous plants, such as wildflowers and grasses, are ideal for septic mounds. Their fibrous root systems help hold soil in place and prevent erosion. They also provide year-round cover and can be a source of food and habitat for beneficial insects and wildlife.
Shallow-Rooted Trees and Shrubs
If you’re set on having trees and shrubs around your septic system, it’s essential to choose shallow-rooted varieties. Deep-rooted plants, such as willows and poplars, can damage the septic system’s pipes and leach field. Suitable options include dogwoods, Japanese maples, Eastern redbuds, cherry trees, hydrangeas, azaleas, boxwoods, holly, and dwarf tree varieties.
What To Plant On Septic Mound: Tips
When selecting plants for your septic mound, consider the following:
1. Consider Sunlight
If the area receives ample sunlight, plant perennials that thrive in sunny areas, such as black-eyed susans, coreopsis, and coneflowers. If the spot is shaded, look for shade-tolerant plants like ferns, hostas, and astilbes.
2. Consider Soil Conditions
Soil conditions around septic systems can vary widely, ranging from wet to dry, and from salty to alkaline. To cover both bases, plant perennials that tolerate both wet soil and salt, such as bee balm, hollyhocks, and wild violets.
3. What To Plant On Septic Mound: Consider Deer Resistance
Deer can be a nuisance in many areas, and they may eat plants growing over septic systems. If you have a high deer population, look for deer-resistant perennials, ground covers, bulbs, and grasses. Examples of deer-resistant plants include lavender, daffodils, and fountain grass.
What To Plant On Septic Mound: Worst Plants
When it comes to planting or landscaping on septic mounds, there are some important factors to consider. While selecting suitable plant options is crucial for maintaining the longevity and efficiency of septic systems, there are some plants that you should avoid at all costs.
Firstly, it’s important to note that planting vegetables on your septic mound is a health risk due to bacteria and pathogens present in the drain field. Therefore, it’s best to steer clear of any vegetable plants.
Another important factor to consider is the depth of the plant roots. Deep-rooted trees and shrubs, such as pussy willows, Japanese willows, weeping willows, aspen trees, Lombardy poplars, birch trees, beech trees, most maple trees other than the Japanese maple, and elm trees, can cause clogging of the septic pipes, which can lead to system failure and costly repairs.
What To Plant On Septic Mound: Sunflower
It is important to avoid planting sunflowers on a septic mound due to the potential risk of contamination. While sunflowers are beloved for their beauty and various benefits, they are not suitable for planting on septic mounds or drain fields. This applies not only to sunflowers but also to other edible vegetables, fruits, and plants.
One of the primary concerns with sunflowers is their deep-rooted nature. Sunflowers can develop extensive root systems that penetrate the soil up to six feet or more. These deep roots pose a risk to the septic system components, such as pipes, as they can potentially cause damage or blockages. This can lead to malfunctions, backups, or costly repairs.
Additionally, planting edible vegetables, fruits, or plants on a septic mound is not recommended. The treated effluent that is discharged into the septic mound contains various substances, including household waste and detergents, which may contain harmful chemicals. Sunflowers, with their ability to absorb contaminants from the soil, can accumulate these substances, making the plant unsuitable for consumption.
To maintain the functionality and efficiency of your septic system, it is best to choose alternative plants with shallower root systems and non-edible characteristics for the septic mound. Consider options such as native grasses, wildflowers, or ornamental plants that provide aesthetic appeal without posing a risk of contamination or potential damage to the septic system.
By selecting appropriate plants, you can ensure a healthy and well-maintained septic system while enjoying a beautiful landscape. Remember, the septic mound is designed for wastewater treatment and soil absorption, so it is essential to prioritize the system’s integrity and prevent any potential risks or complications.
What to Plant on a Septic Mound: Maintenance Tips for a Healthy Environment

When it comes to planting on a septic mound, it’s essential to not only choose the right plants but also follow proper maintenance practices. By implementing these tips, you can ensure a healthy environment while preserving the integrity of your septic system.
1. Wear Protective Gear
When working on or near the septic mound, it’s crucial to wear appropriate protective gear, such as gloves and boots. This protects you from potential contact with drain field or septic mound contaminants and helps prevent the spread of harmful bacteria.
2. Avoid Digging Too Deep
When planting or landscaping on a septic mound, avoid digging too deep to prevent damage to the septic components. Digging beyond the topsoil can disturb the pipes and chambers, leading to potential leaks or blockages. Stick to shallow planting depths to maintain the functionality of the system.
3. Minimize Foot Traffic
Excessive foot traffic on the septic mound can lead to soil compaction, which hinders the effluent treatment process. Avoid standing or walking on the septic mound for extended periods. Minimize foot traffic by creating designated pathways and placing signs to redirect movement away from the mound.
4. Regular Inspections
Perform regular inspections of the septic mound to identify any signs of damage or issues. Look out for signs of leaks, unusual odors, or vegetation that appears unhealthy. Early detection can prevent further damage and ensure timely repairs if necessary.
By following these maintenance tips, you can create a healthy environment on your septic mound while minimizing the risk of damage to the septic system. Remember, proper care and attention contribute to the longevity and effectiveness of your septic system.
What To Plant On Septic Mound: FAQs
What to plant on septic mounds is a common question among homeowners who want to maintain the efficiency and longevity of their septic systems. Here are some frequently asked questions about planting on septic mounds:
What To Plant On Septic Mound: Final Thoughts
In conclusion, planting on a septic mound requires careful consideration of the type of plants to use. It is essential to choose plants with shallow roots, such as wildflowers, to avoid interfering with the septic system’s functioning. Additionally, perennials are preferable to annuals as they require less maintenance. Trees and shrubs with deep roots should be avoided as they can clog septic pipes and destroy septic components.