Transition Period
The 36-month period during which land must be free of prohibited substances before a crop harvested from it can be sold as organic.
The transition period — also called the transition or conversion period — is the three-year (36-month) window during which land that previously received conventional inputs must be free of prohibited substances before crops harvested from it can be sold, labeled, or represented as organic.
What the regulation says
NOP §205.202(b) requires that any field or farm parcel from which harvested crops are intended to be sold, labeled, or represented as organic must have had no prohibited substances applied to it for a period of 3 years immediately preceding harvest of the crop.
The clock starts on the date of the last prohibited application and ends at harvest of the first organic crop.
What "transitioning" means in practice
A transitioning operation:
- Has applied for organic certification but the 36-month clock hasn't fully run on at least one parcel
- Maintains an Organic System Plan and follows organic standards for the parcels in transition
- Cannot sell crops from those parcels as organic until the clock runs
Operations often run split — some parcels already certified organic, others still transitioning. The OSP must document both, and physical/procedural barriers must keep transitioning crops separated from certified-organic crops at every step (see NOP §205.272).
Why it matters
The transition period is the single biggest cost barrier for new organic operations. For three years the operation pays organic certification fees and follows organic practices, but sells crops at conventional prices. Many incentive programs (USDA Transition to Organic Partnership Program, state-level cost-share) exist specifically to bridge this gap.
What restarts the clock
The clock resets to zero if any prohibited substance is applied — even accidentally, even by a neighbor (drift), even by a previous tenant whose application is later discovered. Documentation of past land use is critical; records of conventional applications, lease history, and aerial imagery often play a role in establishing the start date.
Cited regulations
Linked to the current eCFR text of 7 CFR Part 205. Reviewed before publication.
QO Editorial Team
Quick Organics
Quick Organics' editorial team writes about USDA organic certification, the Organic System Plan, and the daily realities of running a certified organic operation. Material is reviewed against the current eCFR text of 7 CFR Part 205 before publication.