Garden
Back to Plant Library

Zinnia

Zinnia elegans

Flower

Zinnias are easy-to-grow, heat-loving annuals that produce a continuous succession of vibrant flowers from midsummer through first frost. They are outstanding butterfly magnets and attract beneficial insects that prey on common pest species.

Growing Conditions

Sunlight

Full Sun

Water Needs

Low

Soil

Well-draining loam; pH 5.5–7.0

Spacing

6–18 inches

Days to Maturity

60–70 days from direct sow to full flower

Growing Zones

1
2
3
4
5
6
7
8
9
10
11
12
13

Thrives in USDA Zones 3–11

Companion Planting

Good Companions

Keep Away From

No known antagonists

When to Plant

  • Direct Sow

    After last frost; direct sow only — dislikes root disturbance

  • Harvest

    Cut stems when outer petals are just opening; plants produce more when regularly cut

Organic Growing Tips

  • Space generously for good air circulation — powdery mildew is the main threat in humid climates.

  • Cut flowers frequently — the more you cut, the more the plants produce throughout the season.

  • Direct sow where they are to grow — zinnias resent transplanting and establish faster from seed in situ.

  • Leave a few seed heads on plants at season's end for self-seeding and bird food.

Common Pests

  • Powdery Mildew
  • Aphids
  • Spider Mites
  • Bacterial Spot

All pest management in Garden uses safe, organic, non-toxic methods only. No synthetic pesticides, ever.