Liquid Iron is a high-performance, iron-rich liquid fertiliser designed for professional use in turf management, horticulture, orchards, and broadacre farming. Enhanced with fulvic acid for rapid nutrient uptake, this formulation provides fast correction of iron chlorosis, improves photosynthesis, and supports vigorous, healthy growth. Ideal for large-scale applications, it delivers consistent results in high-pH or alkaline soils where iron is often locked up and unavailable to plants. Trusted by agronomists, turf managers, councils, and commercial growers across Australia, Liquid Iron maximises plant colour, performance, and nutrient efficiency.
*Always perform a small compatibility trial (“jar test”) before mixing new products.
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Functional Additives: Fulvic acid (bio-chelating agent) – improves uptake efficiency and translocation and Liquid carrier designed for foliar + soil absorption.
(LIR_IBC)
Iron is essential for chlorophyll formation — the green pigment that drives photosynthesis. But in many Australian soils, iron gets locked up due to high pH, compaction, or excessive lime.
This formulation contains:
The result? Fast correction of iron chlorosis (yellowing), deeper green foliage, and improved photosynthetic function for overall healthier growth.
IMPORTANT NOTE: Iron products can have an adverse reaction with our darker liquids. To avoid blockages in sprayer nozzles, we recommend applying the Iron separately from 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.
| Application Type | Rate: | Frequency |
|---|---|---|
| Minimum dilution rate: | 1:50 | |
| Turf: | 150-400ml/100sqm 1.5-4L/Ha |
Apply every 4 weeks in growing season or as required |
| Ornamental Plants: | 10-25ml/10litres water 100-250ml/100sqm |
Apply every 4 weeks in growing season or as required |
| Vegetables: | 150-300ml/100sqm 1.5-3L/Ha |
Apply fortnightly or as required |
| Trees, Fruits, Nuts & Grapevines: | 150-300ml/100sqm 1.5-3L/Ha |
Apply every 6-8 weeks or as required |
| Broadacre Crops: | 3-8L/Ha | Apply as required with normal program |
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.
Do not spray in hot weather conditions. Not compatible with many products. Check the labels and do a jar test first. Iron can stain paths, concrete, paving, clothes, and skin, so always wear old clothes, wash hands after use, and be careful when applying near concrete and paths, etc. Wash off immediately any lasting damage. Keep away from water sources such as ponds, pools, etc. Safe for children & pets when dry. 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.
Liquid Iron does not require watering in, though light irrigation can help if desired. Factors such as temperature, wind, rainfall, soil pH, and leaf wetness affect absorption. Apply during calm, dry conditions and avoid mowing immediately after application.
For commercial use, Liquid Iron is best applied separately. It is compatible with Stimulizer, but mixing with other fertilisers or foliar inputs may reduce effectiveness or cause reactions. Always perform a jar test when trying new blends.
Application frequency depends on turf type, climate, and soil conditions. Many professional operators apply every 2–4 weeks during the growing season to maintain deep green colour and correct iron deficiencies. Adjust based on plant response and soil testing.
Yellowing leaves with green veins (interveinal chlorosis), stunted growth, and pale or dull foliage are common indicators. These symptoms are especially common in alkaline or heavily limed soils.
Yes. It is suitable for ornamental shrubs, trees, fruiting plants, and lawns. Liquid Iron corrects deficiencies, improves foliage colour, and supports nutrient uptake across a wide range of plant types.
When used as directed and allowed to dry, Liquid Iron is safe around children, pets, and livestock. Keep treated areas off-limits until dry.
Early morning or late afternoon is ideal to reduce the risk of leaf burn and maximise absorption. Avoid application before imminent rainfall.
Persistent yellowing despite regular fertilisation often indicates iron deficiency, particularly in alkaline or compacted soils. Liquid Iron provides a fast-acting solution to restore colour and promote healthy growth.
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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!
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