When planning your landscaping, your septic system may not be the first thing on your mind. Yet what you plant and where you plant it can make a big difference in how well your system works. The wrong landscaping choices can damage pipes, block drainage, or even cause a full system failure. With a bit of planning, you can keep your yard looking great while protecting your septic system.
Planting near your septic system
It might seem natural to plant trees or shrubs over your septic field to fill the space, but deep roots can become a serious problem. Tree roots search for water and nutrients, which makes your drain field a perfect target. Once they reach the pipes, they can cause cracks, blockages, or leaks. To avoid this, plant only grass or shallow-rooted ground cover above the drain field. Keep larger trees and shrubs at least five metres away from your septic components.
Choosing the right plants for septic tank landscaping
The best plants for septic tank landscaping are those with shallow roots that help prevent erosion without clogging the system. These include native grasses and hardy perennials that can tolerate both wet and dry conditions. Some good options for Ontario yards include:
- Fescue or rye grass
- Wildflowers such as black-eyed Susan or coneflower
- Low-growing ground covers like creeping thyme or clover
Avoid vegetables or edible plants near the drain field, as wastewater can contain bacteria that are unsafe for consumption.
Avoiding heavy structures and hard surfaces
Your drain field needs to breathe. Adding patios, decks, driveways, or heavy garden features on top of it can block air flow and prevent proper drainage. The weight from vehicles or large stones can also crush underground pipes. Keep any hardscaping or heavy objects well away from the septic area. A good rule is to use light, movable items such as benches or birdbaths instead.
Managing rainwater and soil drainage
Proper grading and drainage are essential for a healthy septic system. Directing roof runoff, downspouts, or irrigation water away from the drain field prevents oversaturation. When the soil becomes waterlogged, it can no longer absorb wastewater effectively, which increases the risk of backups. Maintaining good drainage around the system is one of the best ways to avoid a septic tank landscaping issue.
Making thoughtful landscaping choices can help your septic system work efficiently for many years. At Plumbing Dunn Right we proudly serve Milton, Georgetown, Oakville, Burlington, Halton Hills, Flamborough, Acton, and Puslinch. With over 10 years of licensed and insured experience, we always get it Dunn Right the first time.
Contact us today to book a consultation and learn how to protect your septic system through smart landscaping.
