I grew dwarf zinnias from seed in containers this season and was honestly surprised by how well they did. They stay compact, don’t need much space, and once they start flowering they just keep going.
One thing I really like is that regular cutting actually encourages the plants to branch and produce even more flowers.
I put together a simple step-by-step guide showing how I grow dwarf zinnias from seed in pots, from sowing all the way to flowering:
https://dinasgarden.com/how-to-grow-dwarf-zinnias-from-seed-in-pots/