How to plant zinnia seeds You can either direct sow zinnia seeds in late spring or early summer when temperatures begin to rise or start them indoors to get a head start.

Related: The 12 Best Places to Buy Seeds Online in 2025 How to Plant Zinnias Whether you start zinnia seeds outdoors or indoors will depend on where you live and your personal planting style.

I fill pots with potting soil. If I want to grow a dozen petunias or zinnias I scatter eight to 10 seeds per pot and transplant them to individual pots when they reach the three- to four-leaf stage.

Growing From Seed vs Transplanting Starting zinnias from seed is a great way to see the full lifecycle of your flowers. Seeds are often sown indoors about four weeks before the last frost.

Start your zinnia seeds now to have them ready for the garden in about six weeks. At left is Profusion double deep salmon along with Profusion double hot cherry (Courtesy of Tom MacCubbin) ...

Easy plants to start from seed Zinnia: Zinnia flowers are really easy to care for in general. Once they start blooming, these plants will not stop until the first freeze.

Zinnias require nearly identical care as basil. From moist, well-drained soil to plentiful sunlight, zinnias and basil will thrive together in the same setting. Start zinnia seeds indoors at the ...

To keep your zinnias blooming, one of the most important steps that I mentioned earlier is to remove the flowers as they are fading and well before they start going to seed.

A zinnia lacking petals may have grown from hybrid seeds, which don’t always yield the same flower as the original hybrids.

A seed-starting mix will have fertilizer and the right components to ensure the right amount of drainage for good root development. Look for a peat-free and organic mix.