IKF-309 is a new fungicide being developed by ISK for the control of powdery mildew on environmental horticulture crops. The IR-4 Project completed 18 crop safety trials on 12 environmental horticulture plant species or genera during 2018 to 2021. In these trials, all 12 species or genera exhibited minimal or no injury. One species (Pelargonium x hortorum) exhibited minimal or no injury in 3 trials (Table 1) and 11 species or genera exhibited minimal or no injury in the limited number of trials (one or two) for each crop. When first registered, it may be possible to include these in the list of crops with no known adverse impact.