Landscaping around septic center infographic

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Landscaping Around Your Septic System: What’s Safe (and What to Avoid)

Your yard is your pride and joy—but if you have a septic system, some landscaping choices can cause big trouble underground. Roots, water, and heavy soil can all interfere with your system’s ability to function properly.

Here’s how to safely landscape around your septic system so it looks good and works great—for decades to come.

First: Know Where Your Tank and Drain Field Are

Before you plant anything, locate your septic tank and drain field. The tank is usually 10–25 feet from the house; the drain field is a series of buried lines that absorb water from the tank.

These areas are not meant to be disturbed. Digging, planting, or compacting the soil here can lead to expensive repairs.

What You Can Safely Plant Over a Drain Field

Stick with shallow-rooted plants that won’t interfere with the underground system. Good options include:

Grass (best option!)
Low-growing ground covers like clover or creeping thyme
Herbaceous perennials with shallow roots (hostas, daylilies, black-eyed Susans)
Wildflowers for a pollinator-friendly cover

Keep plants low-maintenance and avoid anything that needs frequent watering or deep digging.

What to Avoid Near Your Septic System

Trees and large shrubs: Roots can invade pipes and tank joints
Vegetable gardens: Septic fields may harbor pathogens that make them unsafe
Anything with invasive or thirsty roots: Bamboo, willow, maple, birch, etc.
Mulch beds or raised beds: They retain moisture and compact soil
Structures: No patios, sheds, driveways, or playgrounds on top

“We planted a willow tree for shade and it cracked our pipe within five years. Had to dig the whole thing up.” – Josh L., Tennessee

Tips for Maintaining a Healthy Landscape + Septic System

Use light mulching—no heavy bark or stone
Mow with care to avoid compacting soil over the drain field
Install barriers to keep roots away if nearby trees already exist
Use drip irrigation sparingly and away from the drain field
Avoid overwatering—excess moisture floods the system

Can You Landscape Over the Septic Tank Lid?

Yes, but with caution. Many homeowners disguise the lid with:

Decorative rocks (lightweight and movable)
Removable stepping stones or covers
Ground covers or grass

Whatever you do, make sure the lid is easily accessible for inspection and pumping.

Final Takeaway: Form + Function Matter

Your septic system needs space to breathe—literally. The right landscaping will make your yard beautiful and protect your tank and drain field for years to come.