TYPE: Natural Gypsum
BEST SOIL:  Heavy soils that are high in Magnesium, low in Calcium and needs improved soil structure.
BEST CROP: Potato, vegetables,  alfalfa, corn, soybeans.
BENEFIT: pH neutral, season-long release, cost-effective.


MegaSol processed gypsum from GLC Minerals is 20% calcium and 16% sulfate sulfur. This naturally occurring mineral is processed to a fine powder (69% passing 100 mesh) making it extremely effective at providing plants calcium, sulfur and improving soils.

Pure, finely ground MegaSol is more effective at providing plant nutrients than other products like elemental sulfur or limestone. Plus, since MegaSol is pH neutral it won’t change the pH of soils like limestone, elemental sulfur or ammonium sulfate (AMS).

MegaSol provides nutrients to plants at a controlled rate throughout the growing season, unlike highly soluble AMS or thiosulfate which is prone to leaching on lighter, sandier soils. MegaSol is also perfect for soils that are calcium deficient and for crops requiring high amounts of calcium: alfalfa, corn silage or potatoes.

Recent university research has shown that alfalfa is quite responsive to calcium sulfate. The average response yielded more than 1 ton/acre. Potato yield and quality responses to applied calcium are consistently seen in Wisconsin. Calcium-treated tubers have been shown to resist bacterial soft rot in storage. In Wisconsin, soils with a calcium soil test less than 400 ppm on sands or less than 600 ppm on medium-textured soils are most likely to respond to MegaSol.

While there are numerous sulfur fertilizer sources, MegaSol can provide season-long sulfur nutrition more cost effectively.

Sulfur behaves similar to nitrogen in soils and is subject to leaching. The entire state of Wisconsin has seen increasing responses to sulfur. MegaSol is finely ground, releasing sulfate sulfur into the soil solution for season-long uptake. High application rates of MegaSol has shown to reduce soil-dissolved reactive phosphorus which may result in reduced phosphorus in runoff. Dairies that struggle with high soil phosphorus levels may benefit from MegaSol applications.

Start Your Order Today!

Complete the form below, call us at 1-800-236-7737, or email to get started on your order.

1450 Bylsby Ave Green Bay, WI
7:30am – 4:30pm Monday – Friday
after-hours answering service available