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Catalog Codes

seeds code image OG after cultivar name = Organically Grown, entire lot is certified-organic seed. See also our list of certifiers.
ECO after cultivar name = entire lot is sustainably grown seed.
BD after cultivar name = entire lot is biodynamically grown seed.
PVP = Plant Variety Protected. Unauthorized propagation of the seed is prohibited. The use of PVP in the catalog is for informational purposes only and in no way constitutes an endorsement by Fedco of plant patenting.
AAS = All-America Selection.
OSSI = Open Source Seed Initiative-pledged varieties. See OSSI website for more information.
indicates cold-hardy through at least part of the Maine winter.
= a variety introduced by Fedco followed by the year first offered.
Ω = a variety grown and supplied by the plant breeder. Independent plant breeders, continuing a long tradition of adapting varieties to local tastes and conditions, are the backbone of culture. For the most part eschewing plant patents, their work is their reward. Fedco is committed to buying seed from small breeders to give economic support to their work. Though we can find cheaper seed elsewhere, we prefer not to compromise on quality or ethics.
= a variety especially attractive to pollinators.
~ = approximately
BR = Breeder Royalty. We pay royalties to independent breeders when we buy their seed from other sources.
IR = Indigenous Royalty. We pay royalties to indigenous peoples, whose varieties we sell.

Supplier Codes:
Know where your seed comes from! This unique Fedco feature provides information about the source(s) of each seed variety. Varieties with more than one supplier may have two or more codes. We code according to our best information at press time. When seed is short we must sometimes change suppliers later in the season. With notable exceptions, we generally choose varieties based on their merits rather than on our supplier preferences. We do not offer genetically engineered varieties, although we purchase from corporations engaged in genetic engineering. Use the supplier codes to help you make your own choices about whom you are supporting and which varieties are best for your garden or farm. Codes are as follows:

① Small seed farmers including Fedco staff.
② Family-owned companies or cooperatives, domestic and foreign.
③ Domestic and foreign corporations not part of a larger conglomerate.
④ Multinationals not to our knowledge engaged in genetic engineering.
⑤ Multinationals who are engaged in genetic engineering.
⑥ Syngenta, manufacturer of neonicotinoids.

Basic Definitions
  • Open-pollinated varieties produce seed true to type if they are allowed to cross-pollinate only with other plants of the same variety. If they cross with other varieties of the same species, their seed will not be true.
  • Hybrid varieties are those produced from the crossing of two different inbred lines. Seed saved from hybrid varieties will not breed true in the next generation.
  • Amongst open-pollinated plants, self-pollinated (selfers) usually reproduce by using their own pollen. Crossers usually reproduce through the transfer of pollen from one plant to a different plant of the same species.
  • Botanical nomenclature goes from the general to the specific. Plants are classified into kinds by genus, species, and variety. In Cucurbita pepo Sweet Dumpling, Cucurbita is the genus, pepo is the species and Sweet Dumpling is the variety.

Heldover Seed - Like most other seed merchants, we carry over stock from one year to the next, in any given season between 10–30% of offerings. We test all such lots for viability and discard any in doubt. We think you should know as much as possible about our seed. Heldover seed is not necessarily inferior to fresh seed; we have confidence in all lots we offer. We commission two-year productions of some varieties to decrease our growers’ costs, increase their efficiencies and improve their isolations.

Optimal Germination Guide - Sowing seeds at sub-optimal temperatures is the most common cause of failure. We include information in some footers about ideal germination temperatures, taken and extrapolated from tables in Knott’s Handbook for Vegetable Growers and The New Seed-Starters Handbook by Nancy Bubel.