Tier 1 - Threat
| Achyranthes japonica | Japanese Chaff Flower |
| Bythotrephes longimanus | Spiny waterflea |
| Carex kobomugi | Asiatic sand sedge, Japanese sedge |
| Crassula helmsii | Swamp crop, Pygmyweed |
| Didymosphenia geminata | Didymo |
| Egeria densa | Brazilian elodea |
| Glyceria maxima | Reed manna grass |
| Hydrocharis morsus-ranae | Frogbit |
| Impatiens glandulifera | Himalayan balsam, Policeman's helmet |
| Imperata cylindrica | Cogon grass |
| Kalopanax septemlobus | Castor aralia |
| Lepidium latifolium | Broad-leaved pepper-grass |
| Ludwigia adscendens | Water primrose |
| Ludwigia hexapetala | Uruguayan primrose willow |
| Ludwigia peploides | Floating primrose willow |
| Murdannia keisak | Marsh dewflower |
| Myriophyllum heterophyllum | Broadleaf/variable-leaf watermilfoil |
| Nandina domestica | Heavenly bamboo |
| Oplismenus hirtellus ssp. undulatifolus | Wavyleaf basketgrass |
| Pennisetum alopecuroides | Fountain grass |
| Tamarix ssp. (T. chinensis, T. parviflora, T. ramossima) | Saltcedar, Tamarisk |
| Vitex rotundifolia | Beach vitex, Roundleaf chastetree |
