Organic
In agriculture, a production system certified under USDA National Organic Program (NOP) standards that prohibits synthetic pesticides, synthetic fertilizers, GMOs, and specified other inputs. In common usage, also refers to growing practices that avoid these inputs without formal certification.
“Organic” in food and agriculture has two distinct meanings that are frequently conflated: the legal certification standard defined by the USDA National Organic Program, and the informal practice of avoiding synthetic inputs.
The Legal Definition
USDA Certified Organic is a regulated label governed by the National Organic Program (NOP), administered by the USDA Agricultural Marketing Service. To sell produce as “certified organic,” growers must:
- Complete a three-year transition period for land (no prohibited substances for 3 years before certification)
- Use only NOP-approved materials for pest, disease, and fertility management
- Avoid synthetic fertilizers and synthetic pesticides
- Avoid GMO seeds and materials
- Maintain detailed records and undergo annual inspection by an accredited certifying agent
Certification is required to label and sell products as “organic.” For home gardeners, certification is not necessary or practical. The legal label only matters in commercial contexts.
What Organic Prohibits
Prohibited inputs under NOP standards include:
- Synthetic nitrogen fertilizers (urea, ammonium nitrate, synthetic NPK blends)
- Synthetic pesticides (most conventional insecticides, herbicides, fungicides)
- Sewage sludge (biosolids) as fertilizer
- Irradiation
- GMO seeds and materials
What Organic Permits
Organic production permits:
- Natural mineral fertilizers (rock phosphate, kelp meal, bone meal)
- Biological controls (beneficial insects, Bacillus thuringiensis spray)
- Copper and sulfur-based fungicides (with restrictions)
- Many naturally-derived pesticides (neem oil, pyrethrin, kaolin clay, insecticidal soap)
- Cover crops and compost for fertility management
The NOP maintains a National List of Allowed and Prohibited Substances at ams.usda.gov that specifies every permitted and prohibited input.
For Home Gardeners
Most home gardeners who say they garden “organically” mean they avoid synthetic pesticides and fertilizers, not that they’re certified. This is a perfectly reasonable approach, just not legally the same as certified organic production.
The practical distinctions that matter for home growers:
- Synthetic fertilizers are efficient and fast-acting; organic inputs require more planning and have slower release
- Organic pest management requires more frequent monitoring and earlier intervention
- Compost-based soil building produces more resilient soil over time than synthetic fertilizer alone, but takes several years to develop
The Price Premium
USDA certified organic produce commands a price premium at retail: USDA ERS data consistently shows organic premiums of 20-100% over conventional for most produce. The premium exists because organic production typically has lower yields and higher input costs than conventional production. Home gardeners capture this premium as value when they grow their own - a pound of organic tomatoes grown at home is worth the organic retail price, not the conventional price.