PLEASE NOTE THIS ITEM IS 200L IN A BARREL. FORKLIFT DELIVERY FOR A PALLET IS REQUIRED AND FOR COMMERCIAL PREMISES ONLY. MADE TO ORDER – PLEASE ALLOW 2 WEEKS FOR DISPATCH. CAN NOT BE DELIVERED TO RESIDENTIAL ZONES.
Maximise Root Development, Soil Health, and Plant Productivity, Commercial Strength
Super concentrate Bio-stimulant & natural chelating agent - with natural stimulants, minerals, and nutrients. Super concentrate, premium Fulvic acid-based product. A powerful bio-stimulant containing more than 75 minerals, humic acid extracts, and natural plant stimulants. This unique formula, a ‘Trade Secret,’ was invented by Plant Doctor’s founder, Daniel Fitzhenry, with remarkable results. Stimulizer is widely used by hydroponics growers and professional growers across Australia and worldwide. It provides an immediately available form of food for plants and soil microbes, essential for healthy soil. Stimulizer effectively eliminates root rot diseases under certain conditions and stimulates root growth in a way that no other known product can. Compatible with both acidic and alkaline materials, Stimulizer is one of the most valuable inputs for creating a healthy, well-balanced soil environment for plants to thrive. Often referred to as the ‘missing link’ in plant nutrition.
| Lawns & Turf (Buffalo, Couch, Kikuyu, Zoysia) |
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|---|---|
| Home & Commercial Gardens (Veggies, Flowers, Citrus, Herbs) |
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| Hydroponics & Controlled Environment Agriculture |
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| Broadacre & Professional Agriculture |
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Stimulizer works through a unique combination of chelation, microbial stimulation, and cell signalling that improves plant and soil function from day one. Stimulizer functions as a highly bioavailable fulvic acid complex with a cation exchange capacity (CEC) of 1500, making it one of the most effective natural chelators available. Its low molecular weight allows rapid translocation of micronutrients through plant cell membranes, often within 4–6 hours of application. By stimulating root exudation and microbial colonisation in the rhizosphere, Stimulizer enhances enzymatic activity, nutrient cycling, and overall soil biofunction. The formulation also supports stomatal conductance and chloroplast activity, boosting photosynthetic efficiency even under abiotic stress such as cloud cover, salinity, or heat.
| Function | Description |
|---|---|
| Natural Chelator | Fulvic acid binds to locked-up minerals, making them instantly plant-available (even within 4 hours) |
| Root & Shoot Growth | Stimulates root hair development and cell elongation, giving plants deeper access to nutrients |
| Photosynthesis Booster | Opens stomata to improve energy conversion, especially in cloudy or humid conditions |
| Disease Suppression | Reduces harmful microbes (e.g. Pythium) and boosts beneficial microbial populations |
| Plant Immune Activation | Increases resistance to pests, wilting, and environmental stress |
| Yield Enhancer | Improves flowering, brix levels, and fruit set through increased nutrient absorption |
| Soil Detoxifier | Helps break down chemical residues (herbicides, pesticides, heavy metals) and stabilises nitrogen (urea)f |
| Attribute | Details |
|---|---|
| Form | Ultra-concentrated liquid |
| Key Active | High-grade Fulvic Acid + Humic Extracts + Trace Minerals |
| CEC | 1500+ |
| Minerals | 75+ naturally occurring trace elements |
| Application | Soil drench, fertigation, foliar spray |
| Compatible With | Fertilisers, herbicides, fungicides, insecticides, pH 3–9 |
| Origin | Made in Australia |
| Best For | Lawns, commercial gardens, hydroponics, controlled environments, broadacre operations |
(STM_BARR)
| Application Type | Rate |
|---|---|
| Home | 2ml (40 drops) per 9L watering can OR 3-5mL per 100sqm |
| Broadacre | 780ml per hectare |
| Hydroponics | 360ml to 1000L of water |
| Foliar | Turf: 290ml/Ha |
| Foliar | Vineyard: 400ml/Ha |
| Foliar | General: 3ml/100sqm |
| Frequency | Apply fortnightly or when required. Does not burn or damage the plant, lawn or soil if over-applied, but works best at lower rates. |
Download Application Rates Document or please refer to the rear label for application rates.
Yes. Stimulizer is compatible with PGRs, herbicides, foliar feeds, and most liquid fertilisers. Conduct a small jar test and trial on a limited area before large-scale application to ensure compatibility.
Stimulizer enhances nutrient uptake, stimulates root growth, improves microbial activity, and increases soil moisture retention. It acts as a natural chelator and soil conditioner, supporting high-performance turf and crops.
Apply every 2–4 weeks as part of routine maintenance. Weekly applications may be needed during stress, recovery, or peak growth. Effective year-round in Australian conditions.
Rates vary by use case. For turf and horticulture, follow the commercial rate guide. For foliar sprays or hydroponics, dilute as recommended and trial small sections before full coverage.
Yes. Suitable for all Australian turf species including couch, buffalo, zoysia, kikuyu, ryegrass, and bentgrass, as well as ornamentals, trees, and crops.
Yes. It enhances nutrient efficiency and reduces lock-up when used with liquid or granular fertilisers. Always perform a jar test for new combinations.
Not certified organic but contains natural humic and fulvic acids, minerals, and plant-derived bio-stimulants sourced from ancient deposits.
Yes. Compatible with acidic and alkaline nutrient solutions, supporting root development and nutrient uptake in hydroponic systems.
Treated areas are safe for access once the product has dried, suitable for public spaces, parks, sports fields, and commercial landscapes.
Over 75 minerals, natural humic and fulvic acids, and plant-based bio-stimulants designed to boost root growth, soil biology, and nutrient efficiency in large-scale applications.
Help other Plant Doctor Pty Ltd users shop smarter by writing reviews for products you have purchased.
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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