Co-Owner · May 27, 2025
It's almost summer. You know what that means: long days outside, kids running through the yard, and (hopefully) a garden coming in, if you took the time to plant one.
There's nothing quite like getting your hands in the dirt. Whether you're laying fresh mulch, planting flowers, tackling a landscaping project, or growing tomatoes and peppers, late spring gardening is in full swing!
Before you dig in, don't forget to consider your septic system.
Your septic tank and drain field play a major role in keeping your plumbing running smoothly, and the choices you make in your yard can have a big impact on how well they function.
Planting the wrong things, or planting them in the wrong spot, can lead to clogs, cracked pipes, and expensive repairs.
Here are a few do's and don'ts to keep your septic system safe and your yard looking fantastic.
Don't plant a vegetable garden over your drain field
Right out of the gate, do not plant vegetables over your drain field.
Tilling the soil could damage components of your septic system, and vegetable roots can interfere with how your system drains and processes wastewater.
Worse, untreated or partly treated wastewater could seep into your crops. That's gross, and it's unsafe. The produce could carry bacteria that make you or your family sick.
Do know where your septic system is
Before digging holes or breaking ground for a new garden bed, make sure you know exactly where your septic tank and drain field are located.
Even shallow digging can hit lines if installed close to the surface. If you're unsure where your system is, call a septic professional to help map it out safely.
Don't plant anything with deep roots
No deep-rooted plants should be placed within at least 10 yards of your system.
As tempting as it may be to plant a shade tree or a privacy hedge near the lush grass around your drain field, resist the urge, those roots will find your pipes, and the results aren't pretty.
Trees and large shrubs naturally seek moisture, and your septic system is full of it. Roots can crack pipes, invade tanks, and cause serious system failures.
Do plant shallow-rooted flowers and grasses
Flowers and grasses are a great way to use the soil around your septic.
Local wildflowers, clover, ornamental grasses, and creeping plants make beautiful landscaping options and won't interfere with your system.
They also help prevent erosion and require minimal maintenance.
Don't hardscape or build raised beds
Raised garden beds or hardscaping might seem like a good idea for curb appeal, but placing them over your septic tank is not a good idea.
Heavy structures pack down the soil and mess with how it soaks up wastewater. Like the roots we talked about, they're bad for your pipes. They also make it hard to get to the system when it needs work. An open area makes for a happy drain field!
Do keep water use in mind
If you plant flowers, remember your septic system already gets plenty of water from the house.
Adding irrigation or overwatering plants near your drain field can overwhelm the system and keep it from working right. Your little paradise could also turn into a swampy mess.
Stick to drought-tolerant plants if you can, and don't put sprinklers near your septic tank.
The bottom line
With some forethought and a green thumb, your garden and your septic system can absolutely live in harmony. While there are some exceptions to what you should plant for maximum efficiency, remember to stick to our dos and avoid our don'ts so your yard can be both beautiful and functional.
Our team includes environmental scientists, tradesmen, and seasoned pros.