The Best Gypsum Powder of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Gypsum Powder of 2022. Check our ranking below.

2,590 Reviews Scanned

Rank No. #1

Olympus Myco 97% Pure Gypsum Powder, 1 lb – High Solubility Calcium Sulfate Dihydrate for Soil, Gardens, Lawns, and Mushroom Substrate

Improves Soil & Substrate Structure: Prevents compaction and enhances air circulation for healthier roots and mushroom mycelium. Ideal for gardens, lawns, and grow operations.
Boosts Plant and Mushroom Growth: High-purity gypsum for gardening delivers essential calcium and sulfur while maintaining a balanced pH for vibrant, thriving plants.
Enhances Water Retention: Promotes even moisture distribution, helping soil and substrate stay hydrated without becoming oversaturated or soggy.
Reduces Clumping & Improves Texture: Our garden gypsum loosens soil and substrate for better airflow, stronger root development, and healthier mushroom cultivation.
Solution-Grade Purity (97%-99%): Premium gypsum soil amendment rich in calcium sulfate dihydrate to improve soil structure, reduce erosion, and support robust growth.

Rank No. #2

[Mycology Grade] - Made with the mushroom grower in mind. Packaged in a HEPA filtered facility by experienced mycologists. This ensures no contaminants will enter your grow area.
[High Purity] - 97% calcium sulfate dihydrate. Ultra fine and highly soluble in water, making it easy to mix.
[Improves Soil Structure] - Reduces clumping and allows for better absorption of water. Gypsum also provides essential minerals for increased yield. Gypsum can also repair damage from excess salt in soil.
[Versatile Substrate Amendment] - Use gypsum for mushroom substrate, your garden, landscaping, grain spawn, and so much more. Supports plant health and can increase yield by 50% or more when added to mushroom fruiting blocks. Best known as an essential ingredient in CVG, which is a substrate blend of coco coir, vermiculite, and gypsum.
[Affordable Quality] - Quality you can trust at a price that doesn't break the bank. Every day, we strive to provide the most value to our customers.

SaleRank No. #3

Ultra-Fine Lab Grade Gypsum for Mushroom Substrates, Brewing, Tofu - No Additives, 97% Calcium Sulfate 22.5% Calcium (Ca) 18% Sulfur (S) - Packaged in HEPA Enclosure

Included: Myco Basics Gypsum is the highest grade of organic gypsum available, containing 97% Calcium Sulfate Dihydrate, 22.5% calcium & 18% sulfur. Our Gypsum is 100% water soluble and a fine powder, without residue or excessive impurities
Ideal for Mushroom Substrates: Our Gypsum is packaged in a humidity controlled HEPA enclosure, meaning chances of contamination, clumping & other issues are greatly reduced
Improves Soil Structure: Organic Garden Gypsum has been demonstrated to increase crop yields drastically, and can, when used with Garden Lime, reduce nutrient runoff and increase soil food web quality
Resealable Bag: Our Gypsum is professionally packaged and sealed, meaning the Gypsum will remain as a fine powder and can be resealed for later use
Use with Brewing or Tofu: Our gypsum is great for use with brewing, as a Tofu thickener, or in any number of food related recipes that require a thickener

Rank No. #4

North Mountain Supply - GY-1.5lb Food Grade Calcium Sulfate (Gypsum) (1.5 Pounds)

North Mountain Supply Food Grade Calcium Sulfate (Gypsum) - 1. 5 Pound Jar
Packaged in a plastic jar with a tamper evident air tight seal to ensure quality and freshness.
Adds hardness to soft or distilled water when Brewing by increasing Calcium and Sulfite levels increases acidity, and helps to settle proteins during the boil - Use 1 teaspoon of gypsum for 5 gallons
Used as a soil conditioner, soil pH reducer, traditionally used for making tofu, controlling tartness and clarity in wine, and as an ingredient in pickling and canning
Use in the garden to increase calcium and sulfur levels in soil, increase soil's water retention, to treat blossom end rot, and to make mushroom spawn - Used in building to make plasters, molds, and casts

SaleRank No. #5

Down To Earth All Natural Fertilizers Organic Prilled Garden Gypsum - Calcium Sulfate Loosens Clay Soil Greens Grade Mini Granules, 5 lb

Down to Earth Garden Gypsum is a five pound box of all natural mineral fertilizer and is listed by the Organic Materials Review Institute (OMRI) for use in organic production
Commonly used to reduce soil compaction and increase drainage in heavy clay soils, gypsum is also used to help remediate and revitalize alkaline, sodic or saline soils
Down To Earth’s dry fertilizer products which contain a biological or microbial ingredient such as our mycorrhizal inoculants are only shelf stable that carry a two-year expiration date from the production date stamped on the packaging and should be stored dry at room temperature for maximum viability.
Improves the physical condition of landscape, lawn and garden soils while adding calcium and sulfur. Loosens clay. Prilled, fast acting and easy to apply
Registered Organic Input Material (CDFA)

Rank No. #6

Organic Gypsum Powder 10LB - Made in USA - Calcium Sulfate Dihydrate - Garden Soil Amendment Fertilizer for Lawns, Plants, Mushroom Cultivation. Calcium & Sulfur. Cures Blossom End Rot. OMRI Listed

OMRI Listed - Cz Gypsum Calcium Sulfate Dihydrate is an All-Natural mineral fertilizer listed by the Organic Materials Review Institute (OMRI). It may be used in certified organic production or food processing and handling according to the USDA National Organic Program regulations.
Supplies essential nutrients calcium and sulfur to improve plant growth and maximize fertilizer performance.
Loosens compacted soil to allow water to penetrate soil faster.
pH Neutral. Cures Blossom End Rot Perfect for Tomatoes, Roses, and other container garden plants!
Mushroom Cultivation - helps to improve the structure and water-holding capacity of the substrate, neutralizes excess acidity and provides essential calcium

Rank No. #7

Greenway Biotech Gypsum Powder Calcium Sulfate to Improves Soil Drainage and Soil Water Relations- 100% Water Soluble Contains 97% Calcium Sulfate Dihydrate, 22.5% Calcium, and 18% Sulfur- 50 Pounds

WHAT INCLUDES: Greenway Biotech gypsum for soil contains 97% Calcium Sulfate Dihydrate, 22.5% Calcium, and 18% Sulfur. This soil amendments organic gypsum is derived from mined gypsum and is 100% water soluble
IMPROVED SOIL STRUCTURE: This gypsum soil amendment improves the soil drainage and soil water relations and helps the soil take in and retain moisture. It is also used to help remediate and revitalizealkaline, sodic, or saline soils
KEEP SOIL FERTILE & HEALTHY: This soil amendments organic gypsum reduces surface water runoff thereby reducing phosphorus and nitrogen loss from soil. It also Increases earthworms in the soil to keep it healthy
PERFECT FOR PLANT GROWTH: Gypsum supplies bio-available calcium and sulfur, elements vital to proper plant growth and development. The soil gypsum improves the soil’s water-use efficiency which is especially critical in times of drought.
ENHANCED NUTRIENT ABSORPTION: The gypsum fertilizer for plants regulates the balance of micronutrients in grass plants and optimizes the calcium-to-magnesium ratio in soils. The calcium supplied in gypsum is essential to the biochemical mechanisms by which most nutrients are absorbed

Rank No. #8

Earth Science Fast Acting Gypsum—5 lb— Soil Conditioner Adds Calcium, Repairs Salt Damage & Root Growth with Nutri-Bond Runoff Reduction Technology

Loosen Clay: Earth Science Fast Acting Gypsum starts working immediately to loosen clay and other compact soils, creating a better environment for plants to thrive! The result is improved water penetration, more workable soil, and better root development.
Support Healthy Plants: Loosening soil allows for better water retention and airflow which helps the soil to support healthy plants. Gypsum can also help repair salt-damaged soil. Gypsum adds calcium to soil, which helps plants suffering from blossom-end rot.
Finely Ground: Earth Science Fast Acting Gypsum starts working immediately to loosen compact soil. Earth Science gypsum is finely ground, as the small particles penetrate into the soil more quickly. However, the powder is pelletized to allow for easy application.
Nutri-Bond: Earth Science Nutri-bond Technology naturally bonds with soil to reduce nutrient run-off and waster by up to 50%. Apply Fast Acting Gypsum quickly and easily with any spreader.
Safe For Kids & Pets - Earth Science Gypsum is safe to use on any grass type, and people and pets can use the lawn immediately after application.

Rank No. #9

Supply Solutions Gypsum Powder - Purest and Soluble Houseplant Food Fertilizer for Indoor Plants, Outdoor, Lawn, Vegetables - Indoor Plant Nutrients, Improve Plant Growth (50 Pounds)

For Optimal Mushroom Growth: This plant fertilizer soil acidifier creates an ideal environment by fine-tuning pH levels, delivering essential calcium, facilitating efficient water retention, and promoting oxygen circulation.
Maximize Crops and Nourish Soil: Our citrus fertilizer formula enhances yields through essential nutrients, fostering robust plant growth for sustainable, fertile soil and thriving agricultural productivity.
Facilitates Root Development: Our gypsum for mushrooms nourishes roots, promoting strong growth and improved soil structure. This enhances nutrient absorption for optimal plant development, ensuring a thriving and resilient garden.
Supports Water Absorption: Our garden sulfur powder optimizes soil texture, enabling effective water retention. This ensures plant roots absorb moisture efficiently, fostering sustained hydration for vibrant gardens.
Addresses Clay Soil and Compaction: Our house plant fertilizer and outdoor loosens compacted clay soil, enhancing aeration and water penetration. This lawn fertilizer neutralize the impact of dog urine, preventing the formation of unsightly brown spots in your lawn.

Rank No. #10

Alpha Chemicals Calcium Sulfate Dihydrate - Gypsum - CaSO4*2H2O - 10 Pounds

Feed Grade
Very fine powder
Used as a soil conditioner, soil pH reducer, and many other uses.
Also known as Gypsum.

Last update on 2025-10-14 / Affiliate links / Images from Amazon Product Advertising API

How Do You Buy The Best Gypsum Powder?

Do you get stressed out thinking about shopping for a great Gypsum Powder? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Gypsum Powder, which is why we have assembled a comprehensive list of the greatest Gypsum Powder available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Gypsum Powder that you consider buying. Your questions might include the following:

Is it worth buying an Gypsum Powder?
What benefits are there with buying an Gypsum Powder?
What factors deserve consideration when shopping for an effective Gypsum Powder?
Why is it crucial to invest in any Gypsum Powder, much less the best one?
Which Gypsum Powder are good in the current market?
Where can you find information like this about Gypsum Powder?

We’re convinced that you likely have far more questions than just these regarding Gypsum Powder, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Gypsum Powder, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Gypsum Powder. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Gypsum Powder buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Gypsum Powder currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of Gypsum Powder has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an Gypsum Powder?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your Gypsum Powder.
Customer Ratings: Number ratings grade Gypsum Powder objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Gypsum Powder.
Product Quality: You don’t always get what you pay for with an Gypsum Powder, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Gypsum Powder is should be an indication of how long it will work out for you.

We always remember that maintaining Gypsum Powder information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

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The Best Gypsum Powder of 2022 – Reviewed and Top Rated

How Do You Buy The Best Gypsum Powder?

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