Gypsum
great liquid formula to break up the clay, don't skip the gyp
Micronised Gypsum | Liquid Gypsum Soil Conditioner for Clay & Sodic Soils - 1L
Micronised formula. Easy hose or watering can use
Liquid clay buster delivering fast-acting calcium and sulphur in a highly available form. Improves soil structure, reduces compaction, supports root development, and helps manage sodium and magnesium in soils for healthier plant growth.
Micronised Calcium Sulphate (Ca + S)
Improves Soil Structure & Aeration
Fixes Clay, Compaction & Drainage Issues
LawnsGardensFarms
$29.95
New and Improved Formula
Description
Micronised Gypsum – The Premium Liquid Clay Buster
Break up clay soils. Improve structure. Boost calcium and sulphur – all with an easy-to-use liquid.
Micronised Gypsum is a liquid soil conditioner designed to do what traditional gypsum does, only faster and more effectively. Its ultra-fine particles are suspended in a thick, free-flowing liquid, making it easier to apply and faster acting than powdered gypsum. Whether you’re tackling heavy clay, correcting nutrient deficiencies, or improving soil structure, this “clay buster” gets the job done.
The introduction of the “clay buster” in liquid form allows ease of application and more precision in placement. A high-analysis source of micronised natural gypsum combined in a free-flowing suspension. The soil conditioning capacity of gypsum is dramatically magnified with the huge increase in surface area associated with micronisation.
Why Micronised Gypsum works:
- High-Strength Formula – 25L delivers the equivalent of 1 tonne of powdered gypsum (in terms of plant-available calcium).
- Micronised Advantage – The ultra-small particle size massively increases surface area, speeding up reactivity and soil penetration.
- Dual Nutrient Delivery – A powerful source of calcium (16.5%) and sulphur (13%), ideal for crops and lawns craving these essentials.
- Liquid Format – No spreading, no dust, no waiting—just shake, dilute and pour.
- Soil Structure Fixer – Ideal for breaking up compacted clay and displacing sodium and magnesium from the root zone.
Nutrient Profile:
Ca
Calcium
16.5%
S
Sulphur
13%
pH
6.9
SG
1.42
Micronised liquid gypsum for rapid soil conditioning and nutrient availability.
Micronised Gypsum is a convenient and efficient option for delivering immediately available calcium and sulfur in a natural form. It supports protein production in cereal and pasture crops, acts as a reliable midseason supplement for sulfur-hungry plants like canola and root vegetables, and is particularly useful in light, sandy soils that struggle to retain nutrients. It also plays a valuable role in managing soils with excess magnesium or sodium, helping to create a healthier environment in the root zone.
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Features
This product is a soil amendment + secondary nutrient fertiliser, not a primary NPK fertiliser:
- Supplies plant-available calcium (cell strength, root development)
- Supplies sulphur (protein synthesis, chlorophyll function)
- Improves soil structure (especially clay soils)
- Displaces sodium and excess magnesium in sodic soils
- Enhances water penetration and aeration
- Improves fertiliser efficiency and root zone health
Specifications
How it Works
The Science Behind Liquid Micronised Gypsum:
This isn’t just gypsum in water, it’s a finely micronised suspension that exploits particle size physics. Micronisation means:
- Massive increase in reactive surface area
- Faster displacement of sodium and magnesium
- Superior penetration into compacted profiles
- Easier integration into existing liquid nutrition programs
Each droplet carries a dense load of calcium and sulphur, ideal for quick plant uptake and ongoing soil improvement. It also plays a key role in protein synthesis, root resilience, and improving fertiliser efficiency.
Application
| Use Area | Rate | Notes |
|---|---|---|
| Soil Ameliorant or Fertigation | 10–50L/ha | Use higher rates for heavy clay (soil amelioration) |
| Home Garden | 45mL in 9L water | Apply 1L/m² every 2–4 weeks |
|
Foliar (Veg/Orchards/Turf) |
1L per 100L. Up to 7L/ha depending on crop. | *NOTE: whilst this is a micronised product, we recommend drenching with a watering can or putting it through systems that can take larger particle sizes. |
| Foliar Vegetables | 1L per 100L. Up to 5 L/ha equivalent. | Apply weekly or as required. |
| Foliar Orchards & Vinyards | 1 L per 100 L water up to 7 L/ha equivalent. | Apply every 2 – 4 weeks or as required |
| Foliar Ornamentals & Turf | 1 L per 100 L water up to 5 L/ha equivalent. | Apply every 2 – 4 weeks or as required. |
| Broadacre Crops & Pasture | 1–3L/ha in 60–100L water *depending on canopy closure. | Apply as needed |
| Spot-Spraying | 50 mL per 10 L water. | Apply as required |
| Liquid Inject | 2–5L/ha |
Dilute 1:3 minimum. *Use a minimum dilution rate of 1-part product to 3-parts water. Rate will depend on crop, row spacing & soil type. Always consider N & P crop requirements for starters based on reliable soil test data. |
INSTRUCTIONS:
Shake or stir well before use & maintain constant agitation. It is advisable to pre-mix, adding this product slowly while maintaining agitation in spray tank to prevent settling of solids. Will pass through 200-micron filter under ideal conditions, however, a coarse inline filter (500 microns/35 mesh) is recommended to ensure the delivery lines are free from particle contaminants from other sources. Where higher water rates are required for good foliar coverage, do not exceed maximum product rate per hectare. MMS products will leave a visible residue on leaves and fruit when used as a foliar. Avoid spraying close to harvest if produce is susceptible to staining. Sensitive foliage or plants should be test sprayed prior to full scale application. Frequencies are a guideline only and can be adjusted according to farm practices and/or in conjunction with crop monitoring. Ensure suitable spray conditions (e.g. temperature, humidity, wind-speed), prior to foliar application. Compatibility and/or performance cannot be guaranteed when combined with other products. Jar test for compatibility and spray test on small area before wide-spread use.
*Always shake well before use. Maintain constant agitation in tank. Store in a cool place. May become smelly if not sealed.
Safety
Storage and Handling
Store in a cool dry area out of direct sunlight. This product has been tested to store safely down to 5ºC. Sedimentation may occur below 5ºC. Do not pre-mix or store in diluted form. MMS products are very heavy and every care should be taken when handling these materials to avoid back injury. We have found this gypsum has the potential to attract anaerobic microbes which may make the liquid smelly and turn black if not kept air-tight (sealed) immediately after use and stored in a cool location. It is still safe to use after this, however may not be at its best. Avoid mixing with iron-based or phosphate products; jar test recommended
FAQ
What is Liquid Micronised Gypsum used for?
Liquid Micronised Gypsum is used to break up clay soils, improve calcium and sulphur availability, and aid in soil conditioning. It’s ideal for home gardens, broadacre crops, and pastures.
How is Liquid Micronised Gypsum different from regular gypsum?
Unlike traditional granular gypsum, this micronised liquid version has a much finer particle size, which enhances its effectiveness and allows for easier, faster application via watering cans or spray equipment.
Is Liquid Micronised Gypsum suitable for lawns and gardens?
Yes, it’s safe and effective for use on lawns, vegetable beds, garden soils, potted plants, and ornamentals. It helps loosen compacted soil and improves nutrient uptake.
How much Liquid Micronised Gypsum should I apply?
Application rates vary by use, but a typical garden use is 45 mL per 9 L watering can, applied at 1 L per m². For large-scale use, rates range from 10–50 L/ha depending on need.
Can Liquid Micronised Gypsum be used in fertigation or foliar sprays?
Yes. It can be fertigated or foliar-applied (ideally via coarse nozzles or watering cans). It’s suitable for vegetables, orchards, turf, and broadacre crops. Use proper filtration and agitation.
Why does the liquid sometimes smell or change colour?
The product can attract anaerobic microbes if not sealed tightly or stored in cool conditions, which may cause it to darken or smell. It’s still safe to use, but best stored airtight and cool.
Reviews
customer reviews
Showing newest first
Quick and easy to apply.
I needed a quick and easy to apply Gypsum product for some garden beds that were full of hard clay. This product makes it easy to mix and apply in seconds
Micronised Gypsum
Another great product from the team at Plant Doctor. Was drawn to this company as they have a strong background in horticulture/agriculture products where it is important to provide effective and efficient use of products. Backed by science, their products are easy to use with lower application rates avoiding unnecessary overuse of products.
Great value.
Best value for money, this product is slowly making a massive difference on my clay soil.
Great product!
Mixes well, brought life to my clay soil where my lawn just didn't want to grow into! Will be buying more!
Busted!
Yep liquid clay busting gypsum…. What more do I have to say
Easy as
Heaps cheaper and easier than using powder gypsum, highly recommended
Clay Buster AMazing!
Great on clay soil to really get the grass growing. Much reccommended!
Trying liquid for the first time
I've used granular versions before and now onto PD's liquid version, going to use on my lawn to help smash down the clay I've got. Hoping it works good stuff, its totally going to be easier to apply!
Clay be gone!
Prior my Reno I was struggling with hydrophobic clay soil. This is along with natures soil has my soil happy and moist!
Great
Much better and easier to use than solid phase gypsum. Definitely sorted out the clay on my lawn. Great value!
Cheaper and easier than powdered gypsum!
Cheaper and easier than powdered gypsum, just spray it on - no dust clouds!
Liquid Gold
Upon laying my turf down on a clay base I quickly realised even with some organic soil that my lawn was struggling in the summer heat. I applied this post coring and the difference was outstanding, My hydrophobic soil when applied with this and the soil wetter made a remarkable recovery!! shame I cant post before and afters. brilliant stuff
So much better than the competition
Best product to break up clay soil! Used another brand 4 times didnt help much, thought I was going t ok nave to rip up my turf and start again. Try this one, yes you heard that right once, and seen visable differnt in afew day, and new grass shoot with i the week, sucha good product!
Clay nature strip
The lawn on my verge was strugging due to hard clay. Regular applications has already seen it grow like never before in only three months.
Easy
Liquid Gypsum, brilliant for my clay soil, so much easier to apply than granular.
New estate
Living in a new estate my whole soil profile was clay this has helped dramatically while topdressing jas helped the root system get alot deeper than my garden beds
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Customer reviews
customer reviews
Showing the 3 newest
Gypsum
great liquid formula to break up the clay, don't skip the gyp
Quick and easy to apply.
I needed a quick and easy to apply Gypsum product for some garden beds that were full of hard clay. This product makes it easy to mix and apply in seconds
Micronised Gypsum
Another great product from the team at Plant Doctor. Was drawn to this company as they have a strong background in horticulture/agriculture products where it is important to provide effective and efficient use of products. Backed by science, their products are easy to use with lower application rates avoiding unnecessary overuse of products.
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Australian family owned and operated. Online sales since 2009.
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Customer Reviews
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.
Billy Green
Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.
Michael Preddy
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!
