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An experiment on the effect of temperature on seed germination of Petunia hybrida ´Rose Madness´ and Sinningia speciosa ´Brocade Red´ was carried out. Germination temperatures used were 23, 25, and 27℃ for petunia, and 19, 21, and 23℃ for gloxinia. Filter paper and a plug mix were used as germination media. For humidity experiments, seeds of Petunia hybrida ´Red Madness´ and Sinningia speciosa ´Brocade Red´ were used as test plants and sown in plug trays filled with a plug mix. Humidifying was either by fog or mist and subirrigation once a day served as the control. At 27℃, petunia was germinated over 60% on a filter paper on the 5th day after sowing. T_(50) was the shortest both on a filter paper and in a plug mix. The germination percentage was significantly increased as temperature increased at the early stage of germination both on a filter paper and in a plug mix. However, in the late stage, there were no difference in all treatments. For gloxinia, germination percentage was the highest at 23℃, and T_(50) was also the shortest at 23℃. The germination percentage in all treatments except 23℃ was lower in a plug mix than that on a filter paper. The germination percentage of petunia seeds was the highest under fog, followed by mist and then the control, with no statistical significance. T_(50) data indicate quick germination in the order of fog, mist, and the control. Unlike petunia, germination of gloxinia at 30th day after sowing was hastened and T_(50) was shortened in the control. There was a difference in germination between on a filter paper and in a plug mix under the same temperature.
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