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Butterfly Bush Cultivar Approval Process
Background
Butterfly bush
Oregon’s noxious weed quarantine OAR 603-52-1200 was recently amended as it pertains to butterfly bush (Buddleja davidii/variabilis).  As a result, only Oregon Department of Agriculture (ODA) approved seedless butterfly bush cultivars can be propagated, transported, or sold in Oregon. The ODA, in cooperation with Oregon State University (OSU), has developed a criteria and process to approve sterile cultivars of butterfly bush. Cultivars that produce less than 2% viable seeds will be placed on the ODA approved list. In some cases enough data may already be available from creditable studies for the ODA to approve the cultivar.  In other cases, additional field studies may be necessary to approve the cultivar.
Cultivar approval
There are three options available to have your butterfly bush cultivar approved.

Option 1. Sterility evaluation already completed. Under this option, the candidate butterfly bush cultivar is evaluated based on a review of the results of sterility studies already conducted. The submitter should provide the results of independent research that addresses the following:

1. Field studies confirming that the candidate cultivar produces less than 2% viable seeds.
2. Parentage of the candidate cultivar.
3. Ploidy level of the candidate cultivar.

OSU specialist will conduct the review of the submitted data. The cost will be $150 per hour.

Option 2. Sterility evaluation needed. Under this option sterility is determined via grow out evaluations conducted by Oregon State University. This evaluation process will take approximately 18 months and cost $10,000 per cultivar.

Option 3. Confirmation of Interspecific hybrids. Interspecific hybrids of Buddleja are not regulated under Oregon’s Noxious Weed Quarantine (OAR 603-052-1200). However, those transporting, propagating, or selling Buddleja interspecific hybrids need to provide the ODA with proof of parentage. OSU specialist will conduct the review of the submitted data. The cost will be $150 per hour.

Details: Detailed information concerning the above three options can be found in pdf format at http://oregon.gov/ODA/PLANT/NURSERY/docs/pdf/buddleja_screening.pdf
Application process
Anyone wishing to have butterfly bush cultivars assessed for sterility and added to the approved ODA list or needing details of the approval process should contact:

Gary L. McAninch
Oregon Department of Agriculture
Plant Division
635 Capitol Street N.E.
Salem, Oregon 97301-2532
Phone: 503/986-4644           Fax: 503/986-4786
ODA Approved Sterile Buddleja Cultivars
The listed Buddleja cultivars produce 2% or less viable seeds and meet Oregon's standards for sterility. The transport, propagation, and sale of the listed cultivars is approved.
 
Buddleja 'Blue Chip'
Buddleja 'Asian Moon'
Buddleja 'Purple Haze'
Buddleja 'Ice Chip' (Formerly 'White Icing')
 
FLUTTERBY GRANDÉ™ Blueberry Cobbler Nectar Bush
FLUTTERBY GRANDÉ™ Peach Cobbler Nectar Bush
FLUTTERBY GRANDÉ™ Sweet Marmalade Nectar Bush
FLUTTERBY GRANDÉ™ Tangerine Dream Nectar Bush
FLUTTERBY GRANDÉ™ Vanilla Nectar Bush
FLUTTERBY PETITE™ Snow White Nectar Bush
FLUTTERBY™ Pink Nectar Bush
 

Non-Regulated Interspecific Cultivars
These listed cultivars have been proven to be interspecific hybrids through testing and laboratory analysis. They are not regulated under Oregon's noxious weed quarantine and can be transported, propagated, and sold within Oregon. The fertility of these cultivars has not been assessed, though interspecific hybrids generally exhibit low fertility.
 
Buddleja 'Lilac Chip'
Buddleja 'Miss Molly'
Buddleja 'Miss Ruby'