Beginner Gardening: Suggestions to grow from seed in Toronto, 1 by RosemaryA

RosemaryA wrote:
Here in Toronto we have a short growing season (last frost date is in early May). Any suggestions for flowers that are to grow from direct-sown seed, especially annuals? (I'll be planting some native seeds this year but I don't expect them to bloom for the first few years.)

Last year I grew morning glories, alyssum (Lobularia maritima), nasturtium, and cosmos from seed, but I'd like to diversify this year.

Thanks in advance!