PlantRight™ was founded in 2005 to address the ongoing sale of invasive garden plants in California in an environmentally sound and economically viable manner. Though more than half of California's invasive plants were originally introduced through horticultural channels, no cohesive effort previously existed to work with the nursery industry to prevent the spread of invasive plants in the state.
| PRE Score | Date | State | Evaluation | Questions Answered | Screener Confidence |
|---|---|---|---|---|---|
| 9 | California | Euphorbia bourgeana -- California | 20 | 62 % | |
| 15 | Arizona | Nerium oleander L. -- Arizona | 20 | 79 % | |
| 11 | Arizona | Brachychiton populneus -- Arizona | 20 | 66 % | |
| 14 | Arizona | Ulmus parvifolia -- Arizona | 20 | 61 % | |
| 16 | Arizona | Ulmus pumila -- Arizona | 20 | 77 % | |
| 11 | California | Pancratium maritimum -- California | 20 | 75 % | |
| 11 | California | Caesalpinia spinosa -- California | 20 | 75 % | |
| 21 | California | Pennisetum ciliare -- California | 20 | 90 % | |
| 9 | California | Lathyrus nissolia -- California | 20 | 72 % | |
| 15 | California | Searsia lancea -- California | 20 | 66 % | |
| 19 | California | Arum italicum -- California | 20 | 82 % | |
| 7 | California | Cordyline australis -- California | 20 | 64 % | |
| 16 | California | Lathyrus latifolius -- California | 20 | 70 % | |
| 10 | California | Euphorbia characias -- California | 20 | 54 % | |
| 17 | California | Acacia saligna -- California | 19 | 69 % | |
| 18 | California | Acacia longifolia -- California | 20 | 75 % | |
| 17 | California | Melinis repens -- California | 20 | 77 % |
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