MaxGreen - Liquid Iron with Nitrogen Fertiliser For greening and growth 8% Nitrogen; 2.5% Iron (Fe); 1% Sulphur (S)
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.
*Avoid mixing with incompatible products; do jar test
Key Nutrients
Derived From
Secondary & Functional Components
Application: Follow label rates, avoid hot weather, water in lightly after spraying
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.
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.
(MG02L)
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.
| Category | 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 |
Shake well before use. Lightly water in. Apply separately to other products.
Not sure how much to apply for your lawn or garden area? Use our Plant Doctor Product Rates Calculator to get the correct rate tailored to your size and conditions.
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.
Max Green should not be mixed with other products, except for Stimulizer. Combining with other liquids may cause compatibility issues or reduce product effectiveness.
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.
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.
Use 140ml per 100m² for general lawn use, diluted in water. Always read the label for specific dilution guidelines.
Many users report visible greening within 24–48 hours after application, depending on weather and soil conditions.
Yes, Max Green is safe for use on all common Australian grasses, including buffalo, couch, kikuyu, and zoysia.
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.
Yes, once the product has dried and been watered in, treated areas are safe for children and pets.
Max Green is best used during the active growing seasons—spring, summer, and early autumn. Avoid applying in winter when grass is dormant.
Help other Plant Doctor Pty Ltd users shop smarter by writing reviews for products you have purchased.
Money Back Guarantee
Put your mind at ease with our 100% 90 day money back guarantee
Australian Owned
Australian family owned and operated. Online sales since 2009.
Flat Rate Shipping
Flat-rate shipping from $9.95* Fast and affordable!
$9.95 orders under 1kg/1L • $14.95 orders up to 50kg • $49.95 orders over 50kg.
Does not include express. Some location exclusions apply.
View shipping policy for more info
FAST Dispatch
Quick and reliable dispatch Australia-wide*
*Monday - Friday (Excludes Public Holidays)
First time owning lawn. Gave the team at plant doctor a ring and they supplied me with a wealth of information. Products turned up quickly.
Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.
Only have great things to say about Plant Doctor. Organic products and a competitive price, fast shipping and easy to contact with questions. Have had great results with the special mix for lawns, and my plants (indoor and outdoor) love the seaweed secrets. I am excited to test out some of the animal products soon!
Sign-up for exclusive deals and the latest news.
