Best Regional Plants
| Plant Name | Genus | Award | Trial | Region | Year | Trial Cold Hardiness | Trial Heat Zone |
|---|---|---|---|---|---|---|---|
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Peformer | Penn State University | Northeast | 2008 | 6a |
5 6 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Silver Medal | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Silver Medal | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Silver Medal | Ohio State University Chadwick Arboretum - Springfield | Northeast | 2008 | 5b | 5 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performers - Flowers | University of Delaware | Northeast | 2008 | 7a | 6 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performers - Flowers | University of Delaware | Northeast | 2008 | 7a | 6 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performers - Flowers | University of Delaware | Northeast | 2008 | 7a | 6 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performers - Flowers | University of Delaware | Northeast | 2008 | 7a | 6 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Excellent Rating | Massachusetts Horticultural Society at Elm Bank | Northeast | 2008 | 6a | 4 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Excellent Rating | Massachusetts Horticultural Society at Elm Bank | Northeast | 2008 | 6a | 4 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Excellent Rating | Massachusetts Horticultural Society at Elm Bank | Northeast | 2008 | 6a | 4 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | University of Georgia | Southeast | 2008 | 7b | 8 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | University of Georgia | Southeast | 2008 | 7b | 8 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Top Performer | University of Georgia | Southeast | 2008 | 7b | 8 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Exceptional Rating | University of Georgia | Southeast | 2008 | 7b | 8 |
| Diamond Frost® Euphorbia hybrid | Euphorbia | Exceptional Rating | University of Georgia | Southeast | 2008 | 7b | 8 |
