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Farming & Crop NutritionFarmingDriven by nature. Backed by science.
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Sigma AgriScience›Farming & Crop Nutrition

Feed the soil.Feed the world.

Biologically enhanced fertilizers that feed the crop and build the soil. Pick your crop to see a season plan: organic, bridge or conventional.

Find your crop
Vineyard rows in warm evening light with wooded hills behind
From the field

Filmed on working farms

Programs the Sigma agronomy team runs on real farms, with photos from the rows and the roots.

See from the field →
Find your season plan

Where it's manufactured

Manufactured at farm scale

From raw material to your field. Our granulation plants manufacture the product, and our packaging facilities ship it in bags, totes or bulk loads.

  1. 01Raw materialSourced and tested

    We source natural raw materials and check them against Sigma specifications before they go into production.

  2. 02ProductGranulated in our plants

    Two granulation plants formulate and manufacture each product into a consistent granule, with quality control checks throughout production.

  3. 03Field readyBags, totes or bulk

    Our packaging facilities ship finished product in bags, totes or bulk loads to fit how you apply it.

See our facilities →
One of our U.S. granulation plants, from the air.
Crops

Choose your crop

Each crop has its own season plan, from soil prep to post-harvest, for organic, bridge and conventional programs.

Vegetables & greenhouse

High-value crops, often organic
  • Field vegetables
  • Greenhouse and high tunnel
  • Fertigation-ready liquids
See the season plan

Orchards & vineyards

Perennial crops, year-round soil
  • Pecans, citrus, peaches
  • Blueberries and grapes
  • Dormant to post-harvest
See the season plan

Hay & pasture

Forage and grazing
  • Bermudagrass, bahiagrass
  • Mixed and grazed pasture
  • Feeding between cuttings
See the season plan

Nursery & ornamentals

Containers, liners and flats
  • Container and field nursery
  • Greenhouse ornamentals
  • Biology and carbon in the mix
See the season plan

Row crops

Big acres, bulk supply
  • Rice, corn, cotton
  • Soybeans, sorghum
  • Sigma biology blended into your fertilizer
See the season plan
See all 31 crops From tomatoes to pecans: planting windows, rates and spray timings for every crop, in one list.All crops →
Who we work with

Growers, advisors and blenders

Growers

  • A season plan for your crop and program
  • Organic, Bridge or Conventional, one supplier
  • Bags, totes or bulk, shipped worldwide
Request a program

Crop advisors & agronomists

  • Guaranteed analysis and biology for every product
  • N, P₂O₅, K₂O, humic acids and biology per acre, with the math
  • Fits the fertility plan you already write. Growers can use it too.
Open the rate calculator

Blenders & distributors

  • Make your own Bridge blends: Sigma 2-4-2 Bio 2X and Sigma granulars as the organic, biological base
  • Totes and bulk, priced FOB our facilities
  • Agronomy support for the blends you sell
Talk to us about blending
Scenes from the filming · 4 min 47 s
Grower story

The Farm at Okefenokee

A working farm with heritage livestock, field vegetables, greenhouses and orchards, built on soil health. Sigma supplies the products in the farm's fertility program, and Sigma's agronomist works the fields with their team.

  • Field vegetables, greenhouse and orchard blocks on one farm
  • Soil built with organic nutrients, biology and carbon
  • Featured in the documentary Trembling Earth
Trembling Earth premieres in NovemberJacksonville, Florida
Visit okefarm.com
Explore

Everything for your farm

Season plansWhat to apply, stage by stage, for each crop.See the plans → ProductsGranular, liquid and carbon, plus bags, totes and bulk.See the products → From the fieldPhotos, video and the Okefenokee grower story.See the field → ScienceBiology, carbon, release and roots.Read the science → Rate calculatorPounds per acre, bags and totes for your N target.Open the calculator → Request a programTell us your crop, acres and ZIP.Contact Sigma →
Scenes from the filming at The Farm at OkefenokeeA few cuts from the Trembling Earth shoot. The full film premieres in November.