Quick and easy colour
This saved me early on in my lawn obsession as I was learning how to really care for my lawn. Easy to apply and decently quick recent followed
MaxGreen Liquid Iron & Nitrogen Lawn Green-Up Fertiliser, Fast-Acting Turf Food - 1L
Fast colour in days. Corrects iron chlorosis
MaxGreen is a fast-acting liquid fertiliser with nitrogen and iron, enhanced with fulvic acid for rapid uptake. It quickly corrects iron deficiencies, boosts chlorophyll production and delivers deep green colour in lawns, plants and turf.
16-5-2 NPK + 5% Iron, 2% Sulphur & Fulvic
Fast Green-Up & Colour Boost
Fixes Yellow, Weak Lawns
LawnsGardensFarms
$24.95
Due to raw ingredient shortages this product may be temporarily out of stock
Description
Liquid Iron & Nitrogen Fertiliser for Lush Green Lawns and Gardens
MaxGreen by Plant Doctor is a premium, science-backed liquid fertiliser formulated to deliver highly available iron (Fe) and nitrogen (N) for vibrant, deep green leaves. Enhanced with fulvic acid to boost nutrient uptake and retention, MaxGreen rapidly corrects iron deficiencies and supports healthy plant growth — making it essential for lawns, gardens, shrubs, and ornamentals.
MaxGreen is suitable for all plant types and soil conditions, but it performs best when soil pH is managed to avoid extreme alkalinity. If yellowing persists despite treatment, test your soil’s pH and adjust as needed. When using MaxGreen in combination with other inputs (like fertilisers, herbicides, or insecticides), always perform a jar test first to ensure compatibility. Avoid application during high temperatures or full sun, and always rinse equipment and exposed surfaces immediately after use to prevent staining from the iron content.
Why choose Max Green:
- Rapidly corrects iron chlorosis (yellow leaves)
- Promotes strong chlorophyll production for rich green foliage
- Boosts nutrient efficiency with fulvic acid
- Versatile — ideal for lawns, gardens, fruit trees, shrubs, and vines
- Eco-friendly, sustainable plant care solution
- Effective in alkaline or calcium-rich soils where iron is locked up
*Avoid mixing with incompatible products; do jar test
Nutrient Profile Concentrate:
N
Nitrogen
16%
Fe
Iron
5%
S
Sulphur
2%
Nutrient Profile 2L-Hose on ready to use bottle:
N
Nitrogen
8%
Fe
Iron
2.5%
S
Sulphur
1%
MaxGreen is your fast, effective answer to iron deficiency and nutrient lock-up. It quickly revitalises yellowing leaves and supports strong growth, ensuring your plants look their best all year round.
(MG)
Specifications
| Key Nutrients: |
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| Derived From: |
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| Secondary & Functional Components: |
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How it Works
The Science Behind Max Green:
Iron is an essential micronutrient required by plants for the production of chlorophyll, the green pigment that drives photosynthesis. Without enough iron, plants cannot effectively produce chlorophyll, which results in iron chlorosis, a condition marked by yellowing leaves with prominent green veins. This condition is common in lawns, fruit trees, shrubs, and ornamentals, especially in soils that are alkaline, compacted, waterlogged, or high in calcium.
MaxGreen delivers liquid iron in a highly available form, immediately absorbable by plant roots and foliage. What sets it apart is its inclusion of fulvic acid, a natural organic molecule known for its chelating and transport properties. Fulvic acid binds with nutrients like iron and nitrogen, protecting them from being locked up in the soil and helping them cross plant cell membranes more efficiently. This means plants absorb more, faster, especially under conditions where nutrients are usually unavailable.
Nitrogen (N) in MaxGreen supports lush leaf and shoot development, while sulphur (S) plays a role in protein synthesis and enzyme function. The synergy between these three nutrients, iron, nitrogen, and sulphur, improves plant colour, vitality, and growth rate, especially in stressed or nutrient-deficient conditions.
Together, the bioavailable iron, nitrogen, sulphur, and fulvic acid in MaxGreen create a powerful, fast-acting formula that revitalises tired, yellowing plants and keeps your lawn and garden thriving.
Application
- Iron products can have an adverse reaction with our darker liquids. To avoid blockages in sprayer nozzles, we recommend applying the Iron separately to other products. (Stimulizer is safe to mix with Iron). If attempting to mix together, try a jar test in the ratios you want to apply them in first. Iron should always be added last after all other products are diluted with water.
- Applied separately at various frequencies allows you to tailor nutrient input based on the soil/plant/lawn's requirements and condition.
- Shake well before use. Lightly water in. Apply separately to other products.
| Max Green Concentrate | Application Rate | Frequency |
|---|---|---|
| Turf/Lawn Ornamentals | 140-400ml per 100sqm 10-25ml per 9L |
Monthly in growing season |
| Vegetables | 140-300ml per 100sqm | Fortnightly |
| Trees, fruit, nut, grapevines | 140-300ml per 100sqm | 6-8 weeks or as required |
| Broadacre | 15-40L / Ha | Per program |
| Max Green 2L Hose On | Application Rate | Frequency |
|---|---|---|
|
• Attach hose to sprayer |
2L Hose on Bottle covers 200sqm | Monthly in growing season |
Safety
Safety Guidelines
Do not spray in hot weather or windy conditions.
Iron will stain paths, concrete, paving, clothes and skin, so always wear old clothes and gloves, wash hands after use and be carefully precise when applying near concrete and paths etc. Keep away from water sources such as ponds, pools etc. Can cause drying or mild irritation to skin - Rinse with water if contact occurs.
Iron deficiency in many plants & lawns is an indication of high pH or alkaline soil. If yellowing persists or returns rapidly after treatment, soil pH should be checked and adjusted if necessary. Follow application directions as excess liquid iron can lead to other problems, such as zinc and manganese deficiencies. While liquid iron provides immediate relief for plants & soil, it is not an adequate long-term solution for an iron deficiency. Keeping plants/Lawn in well-drained soil amended with sulphur to reduce the pH level can help iron in the soil become more available to plants.
DO NOT SWALLOW. Product may act as an irritant. Avoid inhalation and contact with the eyes & skin. Keep out of reach of children. Store sealed in a cool place.
PLEASE NOTE: THIS PRODUCT MAY FORM SOME SOLIDS THAT CAN BLOCK FINE NOZZLES, MAY HAVE TO STRAIN PRIOR TO FILLING IF CONCERNED. NOT compatible with humic based products.
FAQ
Should I water the lawn after applying Max Green or wait 24 hours?
Foliar uptake can only happen while the leaf is wet. Max Green works best when lightly watered in after application to move nutrients into the soil. Environmental factors—such as wind, time of day, and soil pH—can influence the results, so performance may vary slightly with each application.
Can I mix Max Green with other products?
Max Green should not be mixed with other products, except for Stimulizer. Combining with other liquids may cause compatibility issues or reduce product effectiveness.
What does Max Green do?
Max Green is a liquid fertiliser with high nitrogen and iron. It quickly greens up lawns, strengthens leaf growth, and helps correct iron deficiencies for deeper colour and improved plant vigour.
How often should I apply Max Green?
Apply Max Green every 2–4 weeks during the growing season, or whenever your lawn starts to look pale or lacks vigour. Avoid over-applying to prevent nitrogen overload.
What is the application rate for Max Green?
Use 140ml per 100m² for general lawn use, diluted in water. Always read the label for specific dilution guidelines.
How quickly will I see results after applying Max Green?
Many users report visible greening within 24–48 hours after application, depending on weather and soil conditions.
Can I use Max Green on all lawn types?
Yes, Max Green is safe for use on all common Australian grasses, including buffalo, couch, kikuyu, and zoysia.
Is Max Green safe to use in hot weather?
Apply during the cooler parts of the day—early morning or late afternoon—to avoid stress or burn. Always water in lightly after application in warm conditions.
Is Max Green safe for pets and kids?
Yes, once the product has dried and been watered in, treated areas are safe for children and pets.
Can Max Green be used year-round?
Max Green is best used during the active growing seasons—spring, summer, and early autumn. Avoid applying in winter when grass is dormant.
Reviews
customer reviews
Showing newest first
Great result
First time using iron and the results are fantastic. So green.
MaxGreen Iron with Nitrogen Liquid Fertiliser
Colour of my lawn changed within 2 days. The deep green is amazing and now with a regular program stays this colour all year round.
A product that works!!
I applied this product on my lawn only yesterday and it seems to have greened up more overnight. I also applied this to one of my iron deficient plants and noticing a difference already
Magic Portion!
A must have product in your gardening arsenal! I use this product every 3-4 weeks especially during the growing season to bring out the best in my lawn and neighbors wonder how my lawn stands out in the heat of summer when other lawns look somewhat colorless. The secret is in the ingredients and highly recommended everyone to include it in their shopping cart the next time you visit PD's website.
Awesome green up
I just applied this to my recently scalped lawn. Within 2 days the exposed undergrowth has greened up and thanks to the added nitrogen, is pushing some good growth! Again, unbeatable value and a highly effective product. Definitely recommend.
Get it Green
I've been using Liquid Iron for ages to help green up my lawn, but MAXGreen gives your lawn that added green kick of Nitrogen. Get it!
Best all round spray
I think this product is the best all rounder to keep that green grass, and make sure its healthy. I have buffalo and its spectacular. It wont fix soil issues or nutrient issues. But once those are under control, this is the perfect thing to spray over once a month for that deep lush green that the neighbours are jealous of
MaxGreen
Great product, used in conjunction with some other products and has worked great on the lawn!
Gives lawn to envy
Changed to plant doctor from another brand and have been very happy. Max green gets your lawn a lush dark green colour that people have to feel to see that it truly is real lawn.
Deep...Deep Green
Normally the Doctors I see deliver me grief...but the Plant Doctor continues to deliver me good news over and over again. This Max Green does exactly as it says...and I dare say that as far as a deep green turf colour...my lawns would give the Adelaide Oval a run for their money. Thanks again Plant Doctor.
Wow amazing profuct
Thanks to PD this greened up my lawn in about 6-12 hours
The name doesn't lie!
This product leaves your lawn lush and dark green. I noticed the dark green colour within several days and a surge of growth throughout the first week. Highly recommend!
Brilliant product
We purchased the Max Green to help with the yellow in our newly laid SWB. It did the job very quickly!
maxgreen
out of all the similar products I have used its the best ...hands down
Green with envy
My neighbours are green with envy … amazing results in days!
Greener grass
I have been using MaxGreen for a couple of months now and have really noticed how much greener the lawn becomes after application. Even through the colder months it works wonders. Looking forward to when the sun comes out and the grass begins to grow. Along with using the other plant doctor products, the results will be stunning.
Green with envy
My neighbours are Jealous of my lawn…. just get some!!!
MaxGreen Iron
Highly recommend, put this stuff on the turf when it was yellowing and could see a difference within an hour. Next morning grass was luscious and green !!!
Great product.
Fast acting with big results..
never seen the lawn so green. Definitely recommend.
Winter Winner
Perfect tool to survive the cold frosts of Victoria. No frost burn or colour loss through winter.
Overnight results
After much deliberation I chose the Champion Maxgreen over the standard iron fertilizer and am really pleased with overnight results. Applied immediately after mowing in the afternoon and woke up the next morning to a deep green SWB lawn. Plant doctor products have many good reviews and pleased to say that I am very impressed and will stay with Plant doctor. Thank you
Green for Dayz
I have waited so long to get a good enough lawn that could benefit from liquid iron. The directions were simple and the results of a deep dark green in my lawn was within a day of application. Amazing results and will be a return customer of this product.
Great Product Easy To Use
Was skeptical moving from my normal Iron Product but this has been a great product so far. And the Quantities you can buy this stuff in is great for the $$$ savings.
Neighbours are green with envy!
From a very dull green to a perfect dark green lawn! Our neighbours are seriously jealous! Used this along with the ben simms pack and our lawn has never looked better!
The Only Nitrogen & Iron Fertiliser You Need
I sprayed only along the edge to see how well this product would work. I came home from work the next day and noticed a dark green strip along the edge of my lawn, it took me a moment to realise what was going on, then i realised. I was over the moon to see how quick and amazing the results were. So i highly recommend this product if you are wanting a quick boost in colour and growth!
What a green up!!
Have just used this for the first time on my couch and all I can say is wow! Amaziong green up and a beautiful dark green at that. Will be using regularly when the lawn needs that little extra something to make it the best on the street!
Great Results
I have been using this on its own and mixed in with SS, Activ8mate and soil wetter, you can see the results within days, my Santa Ana has never been so green.
Also great to mix with some herbicides to yellowing off.
All year round green
There are alot of foliar ferts on the market now and this is still #1 on my list. Very fast healthy green all year round!
Oh wow !
First time buying this product, all I can say is WOW! Used correctly as directed has amazing results !
Great Product
Great product, affordable, definite greening affect and my lawn now looks much healthier!
Green grass in a bottle
Great boost to your lawn, get it green and growing strong!
Winter Glow
I have been using this every 2 weeks during winter to help retain some colour. Our lawn is looking amazing!! So green for a warm season grass in the depths of winter.
Green green green
It really helps with the colour in winter and has a great dose of nitrogen.. great product
MaxGreen & Champion Mini Prill is producing th
Maaaaaaaate!!!!! I had to wind my mower up a full turn and it still cut at least 3-4mm off in the 4 days it wasn’t mown & the colour is better then Greenmaxx especially for this time of year when it doesn’t get anywhere near the sun to help with the photosynthesis process.
You’re onto a great product there mate & can’t thank you enough again, absolutely stoked with how it is for this time of year
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Customer reviews
What customers are saying
5.0
from 0 verified reviews
Quick and easy colour
This saved me early on in my lawn obsession as I was learning how to really care for my lawn. Easy to apply and decently quick recent followed
Verified review
Great result
First time using iron and the results are fantastic. So green.
Verified review
MaxGreen Iron with Nitrogen Liquid Fertiliser
Colour of my lawn changed within 2 days. The deep green is amazing and now with a regular program stays this colour all year round.
Verified review
Customer gallery
Lawns & gardens
See how Plant Doctor customers used MaxGreen Liquid Iron & Nitrogen Lawn Green-Up Fertiliser, Fast-Acting Turf Food in their gardens.
Customer gallery
Lawns & gardens
Real results from Plant Doctor lawnies — see the stories behind the green.
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