Helianthus, from the common name “Sunflower” as the most popular annual species. Helianthus Annus are heat-tolerant, resistant to pest and simply beautiful.

Planting Guide


  • Germination temperature: 20 to 25°C / 68 to 77°F
  • Days to emergence: 3 to 4 days (7 to 10 days under 1 5°C / 60°F conditions)
  • pH: 5.5 to 6.5


  • Growing temperature: above 15°C / 60°F at night and under 35°C / 95°F during the day
  • Irrigation: Slightly drier conditions are preferable
  • Fertilization: Provide sufficient fertilization to avoid yellowing of bottom leaves

Common Problems

  • Insects: Aphids, caterpillars, mites, slugs
  • Diseases: Downy mildew, gray mold, leaf spot, powdery mildew, sclerotinia rot.
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