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Yates Gnat Barrier for Fungus Gnats

$24.99 NZD

*Please note a limit of 2 bags per order due to shipping weight before overweight shipping applies*

*You can order more than 2 bags and I'll be touch to arrange payment if overweight shipping is needed (rates are here). I'll try to get you standard rates if I can. This product counts towards the heavy bag limit, so if combining with other heavy products there's a limit of 2 heavy products total (eg: 1 potting mix 5 litre + 1 gnat barrier). 

 What is Gnat Barrier? 

Yates Gnat Barrier comes in a 4.5 litre bag, and creates an abrasive, physical layer that prevents annoying Fungus Gnats from landing and laying eggs in your indoor pot plants. Gnat Barrier is natural and non-toxic, made from abrasive pumice granules, making it a safer and more effective alternative to using diatomaceous earth.

 How do you use Gnat Barrier? 

Simply sprinkle a layer of the granules over the surface of your pots to create a barrier against Fungus Gnats. Because Gnat Barrier is made of pumice, not diatomaceous earth, you can water through Gnat Barrier with no need to reapply after every watering

Check your layer is at least 3cms deep and covering the surface of the potting mix completely. Water gently straight after applying to settle the granules in and check you've got no gaps. Over time the granules will slowly settle, so top up when the layer becomes less than 3cms deep.

Best used in conjunction with Mozzie Bits to kill the larvae, and a Sticky Trap on top of the granules to trap adult flying gnats. Keep using Gnat Barrier to stop them coming back. 

 How many pots will 1 bag of Gnat Barrier cover? 

Based on the recommended 3cm deep covering, one 4.5 litre bag of Yates Gnat Barrier covers about 10 x 13cm wide pots (more if smaller pots, fewer if larger), so it does depend on your pot size. For the fastest results, use Gnat Barrier along with Mozzie Bits and Sticky Traps (above). 

 What's wrong with diatomaceous earth? 

Diatomaceous Earth isn't earth at all, but actually fossilized remains of tiny, aquatic organisms like plankton. It's often recommended for the same purpose at Gnat Barrier, to create a barrier to deter Fungus Gnats.

However diatomaceous earth is a little controversial when used inside the home, or for indoor plants. Diatomaceous earth (DE) is toxic to mammals unless you find a food grade source. Not great for kids or pets. DE is fine, glass like particles. When dry, which DE needs to be to work, it is like a fluffy powder that easily becomes airborne.

Aside from the health risks, DE doesn't work when wet, so needs to be reapplied every time you water. If you do use diatomaceous earth, keep doors and windows closed so it doesn't become airborne when dry, reapply after watering, and keep pets and kids well away. 

Gnat Barrier, made of natural, non-toxic pumice granules, is a safer alternative that's also more effective for use indoors.


Customer Reviews

Based on 1 review
Gillian Tilson
Gnat Barrier

This product is amazing. It looks fantastic around my plants and no more nasty bugs. The plants look healthier also. Very easy to use

Shipping and Delivery FAQ's


 is FREE for all orders over $80. Orders under $80: Auckland Standard $5, signature required $7, or rural $9. Rest of the North Island and the South Island: Standard $7, signature required $9, or rural $11. Plants, fragile and overweight/oversize parcels have separate rates. 


Stock levels are live. Everything showing in stock online, is in stock right here, right now, in Auckland New Zealand, ready to ship. No drop shipping from other countries. No delays.



Orders ship every week-day, Monday to Friday. Orders placed before 7pm Monday to Thursday leave the next morning. Zoom zoom! Fri, Sat & Sun orders leave Monday (or the next working day).



Normal delivery is 1 to 3 working days. Rural and some regions can take a day or 2 longer, depending on where you're based (orders ship from Auckland). 

More about shipping and delivery > 



"I can’t recommend love that leaf highly enough. I’ve bought a couple of times so far and on both occasions Anna has been more helpful than I could possibly wish for. 5 stars! Don’t hesitate to order from Love That Leaf. Excellent service and super fast delivery." Rob Gordon

Why choose to buy from Love That Leaf?


When you buy from me you're supporting a small, local, family business. Love That Leaf is a registered NZ business, based in Auckland. 


You'll get your planty goodies super fast. Everything showing in stock on the website is right here in NZ, in stock, ready to ship. I ship daily, Monday to Friday. Orders normally leave the courier the same or next working day. Zoom zoom!


I stand by everything I sell and will always help put right anything that goes wrong. When you choose to buy from a registered NZ business (like me), you're also covered by the Consumer Guarantees Act, unlike overseas purchases or private sales, where you can end up stuck with no rights if anything arrives damaged or stops working.


I won't go AWOL on you. I'm here for support and advice anytime, even if you haven't bought from me yet. A lot of lovely people helped me along my plant journey, and I want to pay it forward. Please don't hesitate to ask for help. No obligation at all to purchase. 


"Super impressed with this business. Something that is lost nowadays, is customer service. This however is not the case with Anna from Love that Leaf. Very happy with my purchase, very happy with the product information provided and very happy with the quick shipping and great packaging. Thanks!" Melayna Anderson

FREE shipping for orders $80+
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100% NZ In stock in NZ ready to ship
Fast delivery 1 to 2 days for most of NZ
FREE Shipping For all orders $99+ shipping NZ wide
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100% NZ NZ owned. All in stock locally.
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