Restore and Protect Crops and Trees

CalSip™ is a liquid fertilizer giving crops two important secondary nutrients; calcium and sulfur. While these nutrients are essential to all crops, some require more than others. When high-calcium crops such as apples, cruciferous vegetables, cherries, and citrus fruits are not reaching their growth potential—or showing stunted growth—additional calcium can help improve yields.

Calcium deficiencies can occur in a variety of ways. Soils with low pH are more vulnerable to calcium deficiency. Other fertilizers and soil salinization can also offset calcium levels. Though calcium is not needed in high amounts, a lack of calcium will quickly stunt plant growth. It is also important to note that calcium is not mobile in the plant. This means the plant can suffer from calcium deficiency at any time in its growth cycle. Since calcium is a key building block in the plant’s cell walls, a calcium deficiency will affect all its tissues, including leaves, stems, branches, blossoms, fruit, and seeds.

CalSip can be used during planting or during the growing season to correct and prevent calcium deficiencies. The additional liquid ammonium sulfate fertilizer makes it ideal for many crops which require higher levels of both sulfur and calcium to thrive. Since a calcium deficiency is difficult to detect unless damage has occurred, it’s ideal to conduct a soil test before planting, and a tissue test before harvest, to accurately monitor calcium levels as well as calcium uptake. Keep in mind that calcium may be present in the soil, but not available to plants.

Product Benefits

  • Corrects or prevents calcium deficiency, stunted growth, and reduced yields
  • Promotes strong plant cell growth
  • Improves resistance to stress, drought and disease
  • Balances soil salinity
  • Improves water penetration through soil
  • Easy to apply at planting or throughout the growing season

Composition Guarantee Analysis

Nitrogen (N) 7.00%
7.00% Ammoniacal Nitrogen
Calcium (Ca) 1.00%
Sulfur (S) 14.00%
14.00% Combined Sulfur

CalSip is a liquid ammonium sulfate fertilizer and calcium carbonate fertilizer. It’s ideal for low pH soils, but it can be used to resolve sulfur or calcium deficiencies in many different crops and soil types.

Have us design a custom nutrition plan for you

An AgroLiquid nutrition plan is dependent on your location, climate, soil conditions, and goals with your crop. All of our tailored programs start with reviewing your soil samples with one of our expert agronomists. After our analysis, our team will provide you with a couple options that will help you meet your goals on a budget that won’t break the bank.

AgroLiquid Scientific Advancements

Plant growth can be stunted by a deficiency in any nutrient, even those required in small amounts. If one nutrient deficiency exists, none of the other nutrients can be used to their full potential. Our agronomists have studied this problem extensively, and developed secondary, micro- and macronutrient fertilizer programs to solve solve i

Flavonol Polymer Technology

This bonds with your nutrients and creates a protective layer that makes up to 80% more of your nutrients available to plants. It sounds like magic, but it’s just science.

Application strategies for CalSip

Planter placement

Topdress or sidedress

Broadcast or banded over top of seed zone


Have a specific crop problem you’re trying to solve?

AgroLiquid was founded because there wasn’t a nutritional product that was solving our fertilizer needs; after 35 years of development and research, our chemists, biologists, and agronomists continue to innovate and create the best products on the market. If you have a specific crop problem, ask one of our agronomists and we’ll help you solve it!

CalSip liquid ammonium sulfate fertilizer is used regularly with

High NRG N

High NRG-N is engineered to provide a controlled release of plant-available nitrogen over an extended period of time.

Micro 500

Micro500 provides boron, zinc, manganese, iron and copper. This product does not contain sulfur. Speak with an agronomist to find the best micronutrient combination for your crops.


Sure-K is a high-efficiency soluble potash free of chlorides and hydroxides. It improves potassium utilization in plants and promotes long-term soil health.

Ready to give AgroLiquid a try?

Our suppliers are experienced crop advisors located throughout the U.S. and Canada.
Each crop advisor knows the soil, climate, market, and most popular crops of the area.