| 2022 |
SCHIZACHYRIUM scoparium |
| 2021 |
CALAMINTHA nepeta ssp. nepeta |
| 2020 |
ARALIA 'Sun King' |
| 2019 |
STACHYS 'Hummelo' |
| 2018 |
ALLIUM 'Millenium' |
| 2017 |
ASCLEPIAS tuberosa |
| 2016 |
ANEMONE x 'Honorine Jobert' |
| 2015 |
GERANIUM x cantabrigiense 'Biokovo' |
| 2014 |
PANICUM virgatum 'Northwind' |
| 2013 |
POLYGONATUM 'Variegatum' |
| 2012 |
BRUNNERA macrophylla 'Jack Frost' PP13859 |
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