Zinnia Seeds
Zinnias are one of my absolute favourite summer flowers! Amazingly productive they make great cut-flowers.
Zinnias are best sown once things warm up in spring (October-ish) through to December maybe even January if you have long warm autumns.
Zinnias are pretty quick to flower, usually flowering in around 3 months from sowing, and will usually peak flower for about a month and can flower longer if you keep picking its flowers.