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

$18.99 NZD

100% safe and natural, the 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). 

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?

Dose depends on what you need to promote or prevent. Check the complete list here, or 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).

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

Shipping and Delivery FAQ's


Flat rate shipping is $5.90 nationwide (or $9.50 for rural). Order as many products as you like without paying anything extra for shipping. The only exceptions are plants and fragile or oversize products (like handmade pottery and coffee table books), which have their own rates. 

For $2 you can upgrade to signature required. Well worth it for anything valuable or limited edition that can't be replaced. Choosing signature required gives both of us the ability to claim if anything goes wrong with the courier. Signature required is flat rate $7.90 nationwide (or $12.50 for rural).


Everything showing in stock online, is in stock right here, right now, in Auckland NZ, ready to ship. No drop shipping from other countries. No delays.



Orders ship every week-day, Monday to Friday (except plants which only ship Mondays and Tuesdays). For everything else, order before 7pm Sunday through Thursday, and your order will normally be packed and on the courier the next morning. Zoom zoom! We do ship on Saturdays also when we can, however can't always guarantee a Friday order will ship on a Saturday.



Normal delivery is 1 to 2 working days. Some regions can take longer, 3 to 4 working days is normally the longest wait, depending on where you're based (I'm based in Auckland). Keep in mind covid and extreme weather can both cause delays.

More about shipping and delivery > 



"Anna was brilliant. Order placed and sent the next day. Received in awesome packaging. Couldn’t ask for more... will definitely use you again and again and again. Highly recommend." Scott Guthrie 

"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 local, small, family business. Love That Leaf is a registered NZ business, based in Auckland. 


You'll also get your goodies super fast. Everything showing in stock on the website is right here, in stock, ready to ship to you. I ship daily, Monday to Friday. If you order by 8pm Sunday through Thursday, your order will be normally be on the courier at 8am the next morning. 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.  I'm very happy to help, 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. 


"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

"By far the best customer care I've had in a long time. Website is such a wealth of information and the email with instructions for use after my purchase was fantastic. The pipette for measuring the correct amount was such a great inclusion, and the personalised message on the package was very cool. Definitely my go to shop for plant supplies now. Thanks Love That Leaf! A+++" Karyn Wilson