Aside from trees and shrubs with long root systems, there are several other plant species that should not be grown near septic tanks. Growing vegetables near a septic tank poses potential risks due to the presence of harmful bacteria in the soil. Sewage treatment plants contain feces and other waste, and if the vegetables come into contact with contaminated soil, there is a risk of bacterial transmission. Pathogens such as E. coli and other harmful bacteria can be present in wastewater, and the roots of vegetables such as lettuce or carrots can absorb these pollutants. Eating such vegetables can be harmful to your health. Therefore, keep vegetable gardens a safe distance from septic tanks to prevent contamination.
Another category to avoid near septic tanks is dense ground covers. Plants such as pachysandra, cotoneaster, and periwinkle can interrupt the necessary evaporation process required for the septic system to function properly. These species prevent oxygen from penetrating the soil and suffocate the bacteria that break down organic matter in the septic field.
Finally, certain ornamental plants such as bamboo should also be avoided near septic tanks. While tufted bamboo does not necessarily have large roots, bamboo has a sprawling growth habit that can be invasive and difficult to control. Its rhizomes can travel considerable distances, potentially penetrating sewage pipes and infrastructure. The dense growth of bamboo can make access difficult for maintenance and repairs and make it difficult to fix any problems in the sewage system.
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