Technical Abstract: The loss of several fumigants effective in controlling nematodes in production of field grown floriculture crops has made determining the relative susceptibility of these crops to the primary species of root-knot nematodes important. Greenhouse experiments were performed to assess the susceptibility of several important floriculture crops grown in Florida to the three most common species of root-knot nematode, Meloidogyne arenaria, M. incognita, and M. javanica. Nematode galling and reproduction were evaluated for Celosia argentea, Delphinium elatum, Antirrhinum latifolium, and Helianthus annuus, and were compared to the susceptible host Solanum lycopersicum (‘Rutgers’, tomato). Most flower species tested were highly susceptible to all three species of root-knot nematodes included in these trials. Delphinium was not tested for susceptibity to M. arenaria but was consistently less susceptible to M. incognita and M. javanica than the other floral crops tested for those nematode species.