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Tips for Planting Around a Septic Tank

by Ri Industries

Do you feel that? That’s the sun shining down and warming us up after a cold winter. And sunshine and warmth mean it’s time to start thinking about gardening. For those of us with septic tanks, that means thinking about the plants around your septic tank. How do you know where to plant and what to plant around your septic tank? That’s simple, you ask the experts at Ri-Industries for some tips.

Tip #1: No thirsty plants or trees with deep roots. The root system of water-loving shrubs can become entangled in the pipes of your septic system if planted too close to your drainage field and cause problematic clogging. The root system provides a tree’s primary way of absorbing water, and those roots will extend toward the most abundant source of water in your yard. This means that if a tree is planted too close to a septic system, its roots will grow in the direction of the wet drainage field around it.

Tip #2: It is NEVER safe to plant fruits and vegetables over the septic tank! Eating them might entail ingesting harmful bacteria and you certainly do not want to take that risk.

Tip #3: There is no reason to leave the ground above the septic tank bare. In fact, it is actually advisable to plant the right kind of vegetation to help prevent erosion. Perennials, annuals, and grasses have shallow roots and are good choices to cover the septic tank area. Willow Myrtle trees, Swamp Oak trees, River Red Gum trees, Papyrus shrubs, and Oleander shrubs make particularly good choices to plant near the septic tank.

Septic tanks are not only costly to install, but they provide a very necessary function for your home. It is in your best interest to take heed when planning the landscaping above and around the septic tank to avoid damage, costly repairs, and the extreme inconvenience that accompanies a non-working septic tank.

Ri-Industries produces concrete septic tanks and septic tank lids of the highest quality that are built to last. A septic tank from Ri-Industries delivers many benefits:

  • Engineer-designed and built from fine tolerance steel moulds
  • All horizontal tanks engineered to a maximum depth of 900mm
  • Manufactured from 40 MPa concrete to give additional strength and durability
  • Internally, all joints are sealed, reducing the potential for leakages
  • Available in 14 different sizes, for maximum flexibility
  • Child-proof and vandal-proof concrete lids on our septic tanks give you additional peace of mind – also available as stand-alone replacement lids

For more information, please call 08 8444 8100.

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Gardens Over Septic Tank Soakaways

by Ri Industries

When planning a garden, you may not think about your septic tank, but maybe you should. More specifically, you need to understand the do’s and don’ts of planting in or around your septic tank soakaway, also known as a soakage trench or drainage field.

First, what is a septic tank soakaway?

A septic tank soakaway is a series of underground, perforated pipes that allow septic tank effluent to soakaway over a large area. Excess nitrogen and phosphorus is removed from the effluent as it is purified by the soil. Plant roots can help your septic tank drain system work better by removing moisture and nutrients which in turn help the soil work more efficiently.

What should you plant over a septic tank soakaway?

Deep roots can damage soakaways, so shallow rooted plants are ideal for this area. A septic tank is generally installed about 0.6 to 0.9 meters underground, meaning you do not want the root systems of your small plants or shrubs to extend below this depth. The best plants to use near drainage fields are flowers, grasses, and small groundcovers that will not grow deep enough to disrupt the pipeline of your septic tank.

While Ri-Industries septic tanks are made from 40 MPa concrete, and the engineer-designed tanks are built to withstand anything, it is not recommended that anything with deep roots, especially trees, are planted near your septic system.

Tips: when planting, do not dig too deep and be sure to wear gloves to protect against bacteria that may be in the soil.

Dense covering, such as a lawn, is recommended over a septic tank soakaway to help prevent soil erosion.

Planting a lawn or garden over the soakaway is a good way to care for it while adding beauty to your landscape.

If you really must have plants near your septic system, speak with your garden specialist to find out the ph of your soil and choose shallow rooted plants suited to that ph level.  Otherwise, the simplest answer is to plant a lawn over the soakage trench.

For questions about septic tanks, call Ri-Industries at 08 8444 8100.