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Oxygen Plus For Plants - Hydrogen Peroxide 3% - 1 Litre

$18.50 NZD

"I no longer have an issue with fungus gnats. 10/10, would kill again." William Taylor



Free uses poster included. Plant problem-solving one side, household the other.

100% safe and natural, the original 1 litre Oxygen Plus 3% For Plants is food grade Hydrogen Peroxide (H2O2) and distilled water, used for outdoor gardening, indoor plants, hydroponics and aquaponics. 100% biodegradable (breaks down into water and oxygen molecules). Now also available in new 6% Oxygen Plus Double Strength for larger plant collections.

What's the difference between H2O (water) and H2O2 (Hydrogen Peroxide)?

Hydrogen peroxide (H2O2), occurs naturally in rainwater and acts as nature's cleanser.  It oxygenates soil and bodies of water, is completely non-toxic and safe to use around food, people and animals. Adding it when watering your indoor plants, mimics what Mother Nature does for outdoor plants every time it rains.

Oxygen Plus 3% is distilled water with an extra atom of oxygen. H2O means 2 hydrogens and 1 oxygen atom. The extra 2 in H2O2 means 2 hydrogens and 2 oxygen atoms, called hydrogen peroxide.

What is Hydrogen Peroxide used for?

In human health, hydrogen peroxide is used at different strengths for everything from wound care to toothpaste and cleaning. For our plants, Oxygen Plus Hydrogen Peroxide 3% is used by plant hobbyists and growers to prevent and treat a range of nasties, while promoting better health, restoring a healthier balance for our indoor plants to thrive in.

How does Hydrogen Peroxide help plants?

A few examples: Eliminates root rot while supporting growth of healthier roots. Eliminates fungal infections. Treats fungus gnat infestations. Increases oxygen, creating an environment that harmful anaerobic bacteria, mould, fungi and diseases dislike, but roots love, supporting healthier plants and naturally repelling pests and insects

How do you use Oxygen Plus 3%?

Dose depends on what you need to promote or prevent. Here are the most common uses and directions for each, plus the most popular uses below:


Treat Root Rot

If caught in time, there is hope. H202 kills the bacteria and fungi in the soil responsible for root rot, and restores oxygen to help remaining roots recover faster.  Directions: 1:1 ratio of Oxygen Plus 3% and water. Bottom water or top water so potting mix is fully saturated. Avoid leaves (pouring on leaves can burn them). 

Pests and Insect Repellent (including Fungus Gnats!)

Use during watering for root pests, or as a spray to repel insects that feast on leaves.

For larvae and pests living in potting mix: Wait until top layer of potting mix is dry and plant needs watering. Mix 1:4 ratio. 1 part Oxygen Plus 3% to 4 parts water (eg: 1 cup to 4 cups). Either spray or saturate soil by bottom or top watering as normal. Depending on the insect, adults may continue to lay eggs, so best used in conjunction with treatment such as sticky traps to kill adults also.

For pests that live on and eat leaves: Mix 1:1 ratio. Lightly spray the entire plant. Best used in a fine mist spray bottle. Spray only (do not pour on leaves). Do a spray test first on a couple of leaves, 2 days before treating the rest of the plant.

Whether used as a foliar spray or for treating the substrate, use Oxygen Plus by itself with water (do not mix with other products such as fertiliser).

*Please note some leaves are more sensitive to foliar sprays than others, including Peace Lily and Orchids. Take the same precautions as any treatment applied to leaves, and always do a test spray on a couple of leaves 2 days before treating the rest of the plant when using Hydrogen Peroxide as a foliar spray*

Support healthier, faster root growth

H2O2 provides extra oxygen to roots for growth and germination:

To sanitise seeds: Use undiluted H2O2 3%. Put seeds in a container that can be sealed. Pour Oxygen Plus to just cover seeds. Seal and soak seeds for 4 hours. Rinse with water.

To speed up germination: Mix 30mls H2O2 3% with 2 cups of water (a measuring cup makes it easy to get the right amount). Soak seeds overnight, then plant as usual. 

For planted seedlings: Spray with H2O2 solution of 1 part H2O2 3% to 32 parts water (eg: around 30mls per 1 litre - measuring cup recommended).

For established plants: Mix 1:1 ratio of 3% H2O2 and water (eg: 1 cup of each). Bottom or top water as usual (water soil only, do not pour on leaves).

See the complete directions for use for more, including:

  • Eliminating fungal infections
  • Disinfecting pots and tools
  • Hydroponics and Aquaponics
  • Treating tank water
  • Use in organic gardening

Reviews for Oxygen Plus

"I use this on my orchid roots to stop infections and it is also effective on mealy bug." Noelene Hunt

"I hate fungus gnats; I dilute this 50:50 in a spray bottle and saturate the top inch of soil of my house plants. You can practically hear the eggs popping and the fungus they feed on burning away. I no longer have an issue with fungus gnats. 10/10, would kill again." William Taylor

"I've been struggling with fungus gnats for a year now and this significantly reduced them. I think I probably needed to apply it a few more times to truly get rid of them so next time will be buying a large bottle! Makes the most satisfying sizzling noise as you treat the soil too. Will definitely be buying again." Annabelle

"I was having a problem with fungus gnats in the soil of my indoor plants....used the 3% hydrogen peroxide diluted 1 part H2O2 to four part water, and watered my plants with this every second watering. It certainly did the trick, and my plants are now looking healthier than ever." Marion

"I bought this product primarily to help me clean the roots of orchids when repotting to prevent algae and fungal infections... I’ve been very pleased with it." Erica Hill

Customer Reviews

Based on 9 reviews

Super handy to have in the house for a number of reason - treating Fungus knats, sterilising plant tools and especially when you get a plant with unexpected root rot! love love love

silvia poletti
excellent for plants

it is excellent for plants, what you need to do is however to put the dosage in litres, centiliters so I can understand better the proportion thanks

Great feedback, thank you, I'll pass it on to the company who makes it :)

Works well

Great for getting rid of fungus gnats. Just need to use it a few times.

Craig Reed

I got the H2o2 for one purpose & discovered it has many more uses thanks to the handy poster full of advice, couple this with my mister 360 spray bottle from Anna & the plants are loving it .

Lauren Lee
Very happy with this product and services

I’m very happy with this great product, also the instruction sheet in the box was a very helpful in using it for the first time

Shipping and Delivery FAQ's


 is FREE for all orders $90+. Orders under $90: 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). 

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"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

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