Current UCUI
68/100
Moderate-High Uncertainty
+4 points from prior reading
Potato Market Intelligence
Seed Potato Varietal Purity
Seed potato varietal purity shows whether a lot contains unacceptable mixtures or off-types for its intended crop program. Growers and processors can compare purity status with certified replacement lots, product specifications, acreage needs, booking pace, and compatible alternate varieties.
Market Data
How to read this market
Seed potato varietal purity measures whether a seed lot conforms to its stated variety without unacceptable mixtures or off-types. The market object should identify lot, variety, generation, origin, inspection or testing basis, purity finding, certification consequence, and the processor or crop program for which the seed is intended.
Use purity information with certified lot availability, processor specifications, regional acreage, booking pace, and alternate varieties. Mixed seed can create inconsistent maturity, solids, shape, color, and recovery, so apparently adequate seed tonnage may not be suitable for a specification-sensitive end use.
Data Module
Seed Potato Varietal Purity
ObjectConformity of seed to its stated variety
FieldsLot, variety, generation, origin, purity status
Commercial useSeed sourcing and processor consistency
ComparisonCertified replacement lots and alternate varieties
ImpactUniformity, yield, solids, shape, color
WatchpointMixed lots can be unusable for narrow specifications
Analysis
Why this matters
Varietal purity matters because a processor's raw-material specification begins at seed. Off-types can create field and storage variability that later appears as inconsistent size, solids, maturity, or fry performance.
The commercial signal is therefore not simply certification status but fit for the intended end use. A purity issue in a long-fry variety can be much more costly than the same nominal issue in a flexible fresh-market program.
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 teams, processors, commercial producers, and procurement managers that need to understand seed potato varietal purity. Varietal purity means a seed lot conforms to the stated variety without unacceptable mixtures or off-types. Purity affects field uniformity, crop performance, processing quality, contract compliance, intellectual-property obligations, and certification status. MassGain helps users connect official purity findings with the supply, demand, and price of specific varieties.
A purity problem can be commercially significant even when seed health and total tonnage are otherwise adequate. Mixed lots may be downgraded, rejected, segregated, or unsuitable for processors that require predictable solids, shape, color, or maturity. MassGain combines purity information with certified lot availability, generation, regional acreage, variety demand, processor specifications, booking pace, and alternate origins. Growers can compare replacement seed, processors can protect product consistency, and lenders can understand acreage or revenue exposed to a narrow variety supply. The platform also helps users evaluate whether a premium for verified, dependable material is consistent with market scarcity and historical performance. MassGain does not certify identity or perform testing. It provides the market context needed to translate purity into sourcing, contract, and production decisions.
Use Case
A processor discovers that a seed lot for a long-fry variety contains unacceptable off-types. MassGain shows certified pure replacement supply is limited locally but available in another region. The processor reserves replacement seed for core growers, reduces speculative acreage, and keeps a compatible variety for products with broader specifications.
FAQs
What is seed potato varietal purity?
It is the degree to which a seed lot conforms to its stated variety without unacceptable mixtures or off-types.
Why does purity matter to processors?
Mixed varieties can create inconsistent maturity, solids, shape, color, yield, and contract performance.
How does MassGain support purity decisions?
It links official findings with variety availability, generations, acreage, prices, specifications, 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.