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The Life Cycle of a Sunflower Seed

Named for their resemblance to the sun, these flowers devotedly turn their heads to follow the sun as it passes through the sky, a natural and rare occurrence known as heliotropism. Before your beautiful sunflowers bloom and start following the sun, however, they will have to pass through other life stages.

  1. Emergence Stage

    • After they've been planted to a depth between 1 and 4 inches, sunflower seeds will require approximately 11 days before tiny stems emerge from the soil. Once emerged, seeds pass into the first stage of life, referred to as the vegetative emergence stage.

    Vegetative Stages

    • Once those tiny stems start to produce leaves measuring more than 4 cm, the plant passes into the vegetative stage of life. The vegetative stage is characterized by the number of correctly sized leaves, with V1 standing for one appropriate leaf and V5 standing for five leaves measuring longer than 4 cm.

    Reproductive Stages

    • As a tiny bug begins to form at the top of the stem, sunflowers pass into the final life stage, known as the reproductive stages. The reproductive stages are distinguished by nine smaller stages regarding the size of the bud, bloom of the bud, wilting of the flowers and discoloration of the back of the seed head. Reproduction stages completely end when the back of the flower head turns pale yellow, indicating seed harvest time.

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Growing Sunflowers
  1. All the Stages of a Corn Seed
  2. The Growth Cycle of Sweet Corn
  3. The Life Cycle of a Daisy
  4. The Life Cycle of a Peanut Plant
  5. The Stages of a Bean Plant
  6. The Life Cycle of a Green Bean
  7. Life Cycle of a Broad Bean Seed
  8. The Life Cycle of an Ephemeral Plant
  9. Life Cycle of the Seed Corn Maggot
  10. The Stages of Peaches
  11. Stages of a Sunflower Plant
  12. The Life Cycle of a Sunflower Plant

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