Growing Information

Zinnia elegans

  • Days to germination: 3 to 10 days
  • Germination soil temp: 70F-85F
  • Soil requirements: can tolerate poor soil but fertile soil with organic matter will promote more vigorous growth
  • Water requirements: can tolerate some drought but regular watering will promote more vigorous growth
  • Plant in full sun
  • Sow 1/4" deep
  • Direct sow after all risk of frost has passed, or start in cells/soil blocks but do not let seedlings become root bound and do not disturb roots
  • Space 6-12" apart (closer spacing results in taller plants, but may encourage powdery mildew in humid climates)
  • Pinching when 8-12" tall promotes plant branching
  • Plant height: variable, but most between 24" to 48"
  • Support may be required, particularly if planted close together in farm-style rows.
  • Flowers are ready to harvest after they pass the "wiggle test"
  • Leave flowers to mature on the plant for longer to experience the full potential of their size, shape and colour variations.