← Back to Growing Guides

Growing Zinnias

A row of zinnias in bright red and orange, layered petals, growing on tall stems in a garden bed

About the easiest cutting flower there is, and it blooms hardest right through our hottest months.

SunFull sun
SoilAverage, well-drained, pH 6.0–7.0
Spacing6–18 in. apart
Harvest60–70 days to bloom

How to Grow Zinnias

Planting

Direct sow after last frost, zinnias germinate fast and actually thrive in summer heat that slows other flowers down.

Watering & feeding

Water at the base rather than overhead, wet foliage invites powdery mildew in our humidity.

Harvest

Cut often for bouquets, the more you cut, the more they branch and bloom.

Grows Well With

Plant zinnias near tomatoes and peppers, they draw in pollinators and beneficial insects all summer long. See all our companion planting pairs →

When to Plant

Direct sow April through June. Succession sow every few weeks for a steady supply of cut flowers all summer. See the full planting calendar →

Buy the Seeds We Use

Enchanting Blooms Flower Seeds - Zinnias

From the Seed Center

Shop Zinnias Seeds

$1.50

From the Kitchen: Recipes Using Zinnias

Looking for recipe ideas? Browse the full Recipe Book.