What You Can and Can’t Put Above Your Septic System: Growing Grass Tops the List

Your septic system is an essential part of your property's wastewater management. Proper maintenance is crucial to ensure it functions efficiently and lasts for years. One aspect of maintenance often overlooked is what you can and can't put above your septic system. Hint! We find grass to be your best option!

What You Can Put Above Your Septic System


Growing grass above your septic system is acceptable and highly recommended. Grass acts as a natural cover and helps absorb excess moisture. The grass roots also provide structural support to the soil, preventing erosion.

Shrubs and Small Plants

Planting shrubs or small, non-invasive plants around your septic system can be a good idea. These plants have shallow root systems that are unlikely to interfere with the septic components.


Applying mulch above your septic system is another suitable option. Mulch helps conserve moisture, prevents weed growth, and provides insulation to the soil. It's essential, however, to choose a mulch that is free of chemicals and safe for the environment.

Decorative Features

Decorative features like rocks, stepping stones, or pavers can be added above your septic system without causing harm.

What You Can't Put Above Your Septic System

Trees with Aggressive Roots

Large trees with aggressive root systems, such as oaks and maples, should be planted at a considerable distance from your septic system. Their roots can infiltrate and damage septic pipes and tanks.

Vegetable Gardens

Planting a vegetable garden directly above your septic system is not advisable. The risk of contamination from the vegetables' root systems is a concern.

Concrete or Heavy Structures

Avoid placing heavy structures like concrete patios, driveways, or buildings over your septic system. These structures can compact the soil, potentially damaging septic components or hindering proper wastewater treatment. Worse yet heavy structures can cause the ground to collapse or fracture your septic system due to weight.

Chemicals and Harmful Substances

Do not dispose of chemicals, oils, or hazardous materials near your septic system. These substances can disrupt the biological processes within the system and harm the environment. Longhill Contracting recommends safe disposal methods for any potentially harmful substances.

Properly maintaining your septic system includes making informed decisions about what goes above it. Growing grass is not only acceptable but also highly beneficial for your septic system. However, it's essential to avoid planting trees with aggressive roots, vegetable gardens, heavy structures, and harmful substances in the vicinity of your septic system. Longhill Contracting is your partner in ensuring that your septic area remains in top-notch condition. From system inspections and repairs, Longhill Contracting's services are designed to keep your septic system functioning smoothly and your property environmentally friendly. Contact Longhill Contracting today to learn more about how we can assist you in maintaining a healthy and sustainable septic system.

We come from three generations in the construction industry with over 30 years of experience in civil construction; honesty and trustworthiness is a virtue instilled in our family. This is the model of how we do business.