Cosmos Flower Germination Time. Cosmos require five to seven days to germinate. Plant the shorter types C.
But if you are in tropical regions then sowing time is late summer season. If you want to get a head start on your cosmos before the weather warms enough plant your seeds in a tray indoors. Arrange your cosmos in a vase with other blooms for a pop of cheery colour.
Plant the shorter types C.
If growing in pots pot on seedlings when they are large enough to handle. I love having a cut flower garden and this year I am adding Cosmos to my cut garden beds. This happens in roughly five to 10 days after planting. Transplant them outdoors right after the last frost when the weather is already hot and dry with a full blast of sun.