The first edition of this tool (FNWD 1.0) was released in 2006 and covered taxa that were on the federal noxious weed list (7 CFR 360.200) as of 2006 as well as ten additional taxa named by the Federal Seed Act regulations as actionable "with tolerances applicable to their introduction."
The second edition (FNWD 2.0) was released in March of 2010, and included an additional eleven species: Senecio inaequidens DC. and Senecio madagascariensis Poir. were offically adopted as federal noxious weeds on October 5, 2006 (71 FR 58735), and Lygodium flexuosum (L.) Sw. and Lygodium microphyllum (Cav.) R. Br. are two ferns officially adopted as federal noxious weeds on May 3, 2010 (75 FR 23151). As of August, 2010, the final rule is pending on adoption of seven more species (74 FR 27456): Acacia nilotica (L.) Willd. ex Delile, Ageratina riparia (Regel) R. King & H. Robinson, Arctotheca calendula (L.) Levyns, Euphorbia terracina L., Inula britannica L., Onopordum acaulon L., and Onopordum illyricum L. This update also introduced new and simplified key features, a "key to keys" to assist users in choosing the correct key, and new descriptive information about disseminule types as well as detailed information about the Fabaceae and Poaceae families.
An update to the second edition (FNWD 2.1) was released later that year, in August. This update focused on the usability of the site, with improved page design, new navigation, media viewers, and more.
This new edition, FNWD 2.2, is also a design, navigation, and technology update. The fact sheet content has been incorporated into a database, allowing future updates to be much easier than before. Some content was rearranged; key tips were moved to the "key to keys" page rather than the disseminule types page. An image gallery was added. The keys were changed to changed to server-side rather than downloaded applets to improve accessibility issues with the applets. The only content update in this edition was to incorporate recent taxonomical changes to the genus Orobanche. A few species within this genus were moved to Phelipanche, so the fact sheet and key were updated accordingly.