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Sun Seekers

Short answer: Young sunflower plants (Helianthus annuus) show heliotropism: before the flower heads open, the buds turn to follow the Sun from east to west during the day and swing back to face east overnight. The motion is driven by an internal clock and uneven stem growth.

Once the heads mature and bloom, they stop tracking and mostly stay facing east, which warms them in the morning and draws more pollinators. A uniform field of east-facing heads can give the false impression that open flowers track the Sun. The footage shows sunflower fields, with the presenter.

VideoWrite-up1 sources
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What should you know about Sun Seekers?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. Young sunflowers follow the Sun.

    DD-172-F01 · Write-up · Exhibit A (Heliotropism)

  2. They swing back east overnight.

    DD-172-F02 · Write-up · Exhibit B (Reset overnight)

Video transcript: Sun Seekers: Young Sunflowers Follow the Sun, Then Stop

Sunflowers are not only known for their vibrant appearance but also for their unique behavior known as heliotropism. DID YOU KNOW? Young sunflower blooms exhibit heliotropism by following the movement of the sun across the sky. This means that during the day the face of the sunflower tracks the sun from east to west maximizing its exposure to sunlight. As the sun sets the sunflower resets and prepares to face east again in the morning. This behavior is more noticeable in younger sunflowers and tends to decrease as they mature. NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 25.6s Reel ·

Video coming soonSun Seekers · Instagram Reel
Sun Seekers: Young Sunflowers Follow the Sun, Then Stop Instagram Reel · · 25.6s

The write-up

Young sunflowers follow the sun, then stop. Mature heads face east for good.

  1. Exhibit A

    Heliotropism

    Young sunflowers follow the Sun.

  2. Exhibit B

    Reset overnight

    They swing back east overnight.

  3. Exhibit C

    Before blooming

    Tracking happens before the heads mature.

  4. Exhibit D

    Face east

    Mature heads mostly face east.

  5. Exhibit E

    A false impression

    East-facing fields can look like tracking.

Questions people ask about Sun Seekers

What is heliotropism?

Young sunflowers do it.

Source: Write-up · Exhibit A (Heliotropism) · Wikipedia: Helianthus annuus

Where do they face at dawn?

They reset overnight.

Source: Write-up · Exhibit B (Reset overnight) · Wikipedia: Helianthus annuus

When does tracking happen?

In young plants.

Source: Write-up · Exhibit C (Before blooming) · Wikipedia: Helianthus annuus

Which way do mature heads face?

Warmer in the morning.

Source: Write-up · Exhibit D (Face east) · Wikipedia: Helianthus annuus

Why might fields look like they track?

A uniform alignment.

Source: Write-up · Exhibit E (A false impression) · Wikipedia: Helianthus annuus

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. What is heliotropism?

    1. Following the Sun
    2. Growing underwater
    3. Changing color
    4. Making seeds
    Show the answer

    Answer: A. Following the Sun Young sunflowers do it. Source: Write-up · Exhibit A (Heliotropism) · Wikipedia: Helianthus annuus

  2. Where do they face at dawn?

    1. East
    2. West
    3. North
    4. Down
    Show the answer

    Answer: A. East They reset overnight. Source: Write-up · Exhibit B (Reset overnight) · Wikipedia: Helianthus annuus

  3. When does tracking happen?

    1. Before the heads mature
    2. Only in winter
    3. After death
    4. Never
    Show the answer

    Answer: A. Before the heads mature In young plants. Source: Write-up · Exhibit C (Before blooming) · Wikipedia: Helianthus annuus

  4. Which way do mature heads face?

    1. East
    2. West
    3. Straight up
    4. Random
    Show the answer

    Answer: A. East Warmer in the morning. Source: Write-up · Exhibit D (Face east) · Wikipedia: Helianthus annuus

  5. Why might fields look like they track?

    1. Heads all face east
    2. They spin
    3. Wind
    4. They're painted
    Show the answer

    Answer: A. Heads all face east A uniform alignment. Source: Write-up · Exhibit E (A false impression) · Wikipedia: Helianthus annuus

Cite this case file

Easterling, Marcus. "Sun Seekers." The Detail Department (DetailEnjoyer), case file DD-172, last updated Jan 10, 2024. https://detailenjoyer.com/case/sun-seekers/

Permalink: https://detailenjoyer.com/case/sun-seekers/ · Last updated

Markdown version

Cite a single fact by its ID, for example DD-172-F01 → https://detailenjoyer.com/case/sun-seekers/#DD-172-F01