Short answer:
Artificial grass odour treatments can last several weeks to a few months, depending on pet usage, weather, drainage, turf age and whether an enzyme-based treatment is used. Areas with frequent pet use generally require ongoing maintenance rather than a one-off treatment.
Why artificial grass develops odours in the first place
Artificial turf doesn’t absorb liquids like natural grass. When dogs urinate on synthetic grass, liquid drains through the fibres into the infill and base layers underneath. Over time, bacteria feed on the organic material left behind.
As these bacteria break down urine, they produce ammonia-based gases. This is why artificial grass odours often become stronger in hot weather or after rain.
If the contamination exists below the surface, simply rinsing or spraying the turf fibres will not provide lasting results.
Why some odour treatments don’t last
Many odour treatments fail quickly because they only treat the surface.
Surface-level products may:
- Temporarily reduce smell
- Kill some surface bacteria
- Improve appearance
However, if bacteria remain in the infill or base layer, odours will return as soon as moisture or heat reactivates them. This is often why smells come back in the same spots.
There is no single timeframe that applies to every property. The effectiveness and longevity of any treatment depend on several key variables:
- Number of pets using the turf
- Repeated urination in the same areas
- Summer heat and sun exposure
- Drainage quality and base compaction
- Age and condition of the turf system
- Whether treatment penetrates below the surface
- Ongoing maintenance versus one-off treatment
Well-installed, well-drained turf with regular maintenance will stay fresh for much longer than neglected turf.
DIY enzyme treatments can be effective for:
- Light to moderate odours
- Routine maintenance
- Spot-treating known pet areas
They rely heavily on:
- Correct dilution
- Adequate application volume
- Repeated use over time
DIY treatments are best viewed as maintenance tools, not miracle fixes for heavily contaminated turf.
Professional odour treatments differ in three key ways:
- Higher application volume
- Deeper penetration
- Targeted treatment of the base layer
This makes professional treatment more suitable for:
- Persistent odours
- Multi-pet households
- Turf that has never been properly treated
- High-use or commercial areas
There is no universal schedule. As a general guide:
- Low-use areas may only need occasional treatment
- Moderate-use pet areas benefit from periodic maintenance
- High-use zones often require regular spot treatment with deeper intervention as needed
Odour control should be viewed as ongoing management, not a permanent fix.
Are enzyme treatments safe for pets and children?
Yes. Properly formulated enzyme treatments are non-toxic and safe when used as directed.
Does rain stop enzyme treatments from working?
No. Once enzymes penetrate below the turf surface, normal rainfall does not prevent them from working.
Why does smell return to the same spots?
Repeated urination in the same areas concentrates bacteria in the base layer, requiring targeted treatment.
