Current UCUI
68/100
Moderate-High Uncertainty
+4 points from prior reading
Potato Market Intelligence
Seed Potato Post Harvest Test
A seed potato post-harvest test checks lot health or identity after the field season under the relevant certification program. Growers and processors can use the results with inventory, booking pace, variety demand, and alternate origins because late downgrades can tighten supply close to planting.
Market Data
How to read this market
A seed potato post-harvest test evaluates harvested seed lots for health, identity, or certification compliance using the methods required by the applicable program. The object should identify lot, variety, class, generation, origin, test method, date, result, and resulting certification status.
Use post-harvest results with regional certified inventory, booking pace, processor acreage plans, prices, and alternate origins. Lots can be downgraded or removed after harvest, tightening a specific variety or generation late in the planning cycle.
Data Module
Seed Potato Post-Harvest Test
ObjectPost-harvest seed health or identity assessment
FieldsLot, variety, class, origin, method, result
Commercial useReplacement and acreage planning
ComparisonCertified inventory and alternate origins
TimingAfter harvest, before next planting cycle
WatchpointLate downgrades can create sudden scarcity
Analysis
Why this matters
Post-harvest testing matters because the market can appear adequately supplied until results shrink the eligible pool. The later the downgrade occurs, the fewer replacement options growers have.
The commercial signal should be measured against the remaining clean volume, not the gross harvested seed crop. Variety-specific concentration and planting deadlines determine how quickly a test result turns into a price or acreage risk.
Signal 01
Usable Crop Uncertainty Index
UCUI translates crop and market complexity into a simple uncertainty signal. Higher readings indicate greater uncertainty—not necessarily higher prices.
Understand uncertainty. Anticipate risk. Act earlier.
UCUI is designed to analyze potato-industry publications and data signals across regions, varieties, weather, disease, storage, supply, and demand.
WeatherHigh
DiseaseHigh
StorageMedium
SupplyMedium
Single-day snapshot based on a scan of 11,500+ web and social signals. Get historical and real-time data by clicking the button below.
The MassGain Daily
Today’s market analysis.
A daily editorial synthesis of physical potato data, crop signals, market reporting, and what participants should watch next.
September 16, 2026Latest MassGain publication
Potato market steady for now; Russia’s smaller crop is the salient risk
Spot prices are flat and USDA terminal reports read ‘market steady,’ but a renewed forecast for a smaller Russian harvest and recent regional harvest stress leave seasonal import timing and storage losses as the key uncertainty.
Signal 02
MassGain Potato Index
Independent physical-pricing intelligence and market-trend analysis for procurement, forecasting, contracting, and scenario planning.
Core Russet Carton Median
312.45 USD/MT
Latest qualifying physical-market observation
+4.75 (+1.55%)
Price discovery for the physical potato market
MPI is designed to track physical pricing data, price trends, deltas, and divergences across regions and potato types.
Series window45 days
Current public coverageCore russet cartons
Primary source basisQualifying USDA physical rows
UnitUSD per metric tonne
Single-day snapshot based on most recent 45 days worth of data. Limited to US Russets only. Get more complete, global data about all varieties by clicking the button below.
Signal 03
MassGain Spot Reference
An independent spot reference designed for price discovery, contract discussions, procurement comparisons, and risk modeling.
Russet Burbank — U.S. Midsize
305 USD/MT
Demonstration reference format
+1.6% WoW · Confidence: High
A trusted benchmark for pricing, contracts, and risk
MSR is intended to use real transactions and verifiable physical-market data to support negotiations, price checks, contracting, and risk models.
ProductRusset Burbank
SpecificationU.S. midsize, 40–70 count
Reference typePhysical spot benchmark
StatusIn development
Based on most recent 45 days worth of data. Limited to US Russets only. Get more complete, global data about all varities by clicking the button below. Full access also includes historical data -- including depreciated NYMEX/CBOE/EEX spot references -- projections, trends, and AI-driven insights.
The MassGain Product Ladder
From insight to intelligence to action
Four integrated products built for the physical potato market, delivered through public pages, reports, exports, dashboards, and API access.
1
Content
Original research, commentary, aggregated news, and market updates.
- What matters right now?
- What is happening out there?
2
UCUI™
Usable Crop Uncertainty Index: an AI-powered signal of crop risk and market uncertainty.
- Understand uncertainty
- Anticipate risk
- Act earlier
3
MPI™
MassGain Potato Index: independent physical-pricing intelligence and trend analysis.
- Price discovery
- Regional trends
- Procurement planning
4
MSR™
MassGain Spot Reference: an independent benchmark for price discovery and risk modeling.
- Contracts
- Negotiations
- Risk models
Content + UCUI + MPI + MSR + API access
Get historical series, regional detail, constituent data, exports, alerts, and direct data access.
Overview
Who is this for?
This page is for seed growers, certification managers, commercial producers, processors, and buyers that use post-harvest testing to confirm the health and identity of seed potato lots after the field season. A post-harvest test may involve greenhouse grow-outs, laboratory diagnostics, visual inspection, or other program-specific methods designed to detect viruses, varietal mixtures, or latent problems that were not conclusive during field inspection. MassGain helps users connect test outcomes with the commercial consequences for seed availability, class, variety, origin, planting window, and price.
A region can appear adequately supplied until post-harvest results downgrade or remove lots from the certified pool. That can tighten a specific generation or processing variety months before planting. MassGain adds market context around regional seed inventories, booking pace, alternate origins, acreage plans, and downstream processor demand. Growers can decide when to reserve replacement seed, processors can identify contracted acreage at risk, and procurement teams can compare substitutes before the market becomes urgent. MassGain does not conduct tests or determine certification status. It provides the supply, pricing, and demand framework needed to translate official post-harvest findings into practical sourcing and production decisions.
Use Case
A processor expects growers to expand acreage of a protected fry variety. Post-harvest results downgrade several lots in the primary seed region. MassGain shows the remaining certified volume is booking quickly and that a secondary origin can supply only part of the requirement. The processor reserves alternate seed, assigns the scarce generation to core growers, and uses an approved substitute variety on flexible acres.
FAQs
What is a seed potato post-harvest test?
It is testing performed after harvest to evaluate seed health, varietal identity, or certification compliance.
Can post-harvest results reduce market supply?
Yes. Lots may be downgraded, restricted, rejected, or require additional testing before sale.
How does MassGain support decisions after testing?
It connects results with certified availability, varieties, generations, booking pace, prices, and alternate origins.
Put this market intelligence to work
Get historical data, regional detail, benchmarks, alerts, exports, and API access tailored to your procurement
and market-analysis needs.
Data and Methodology
Professional market-data standards
MassGain is building transparent public market infrastructure. Each live metric will identify its date, unit, coverage, methodology, and source basis.
Data provenance
MassGain uses public, licensed, contributed, and independently derived physical-market information. Source availability and publication schedules vary.
Timing and revisions
Figures may reflect the latest available observation rather than a same-day transaction. Source data and MassGain calculations may be corrected, restated, or revised.
Not transactional pricing
MassGain figures are informational reference values and do not constitute executable bids, offers, settlements, or guarantees that a transaction can occur at the displayed value.
No individualized advice
Content and data are provided for informational and analytical purposes and do not constitute financial, investment, legal, trading, or individualized procurement advice.
Independent publication
Certain observations may be derived from USDA reports. MassGain is independent and is not affiliated with or endorsed by the USDA.
Commercial use and licensing
Public display does not grant rights to reproduce, redistribute, republish, or incorporate MassGain indices or references into commercial products or contracts without authorization.