Free Printable Sunflower Worksheets make it easy to bring the science of sunflowers into your classroom. Download and print these PDF sunflower activities to cover the parts of a sunflower, life cycle stages, heliotropism, seed dispersal, fun facts, and a hands-on science experiment. These printable sunflower resources work beautifully in science centers, small group instruction, and homeschool lesson plans. Students will build science vocabulary, observation skills, and research habits as they explore every stage of this remarkable plant’s life.
Parts of a Sunflower Printables
This colorful anchor chart introduces the external parts of a sunflower with a clearly labeled diagram and thin black callout lines. A beautiful reference poster for science walls, student notebooks, and whole-class instruction.
Parts of a Sunflower Coloring Page
This printable set includes two variations: a labeled black-and-white diagram for students to color, and a cut-and-paste version where students trim the word labels and place each one on the correct part of the sunflower. Both versions actively reinforce the seven external parts.
Label the Parts of a Sunflower Blank Worksheet
Students label the parts of a sunflower with this simple printable blank labeling worksheet. Each part features a simple line and blank box for students to write in the answers. Additionally, we provide cut and paste labels for younger students.
Parts of a Sunflower Learning Mat
This reusable learning mat pairs with a set of label cards for a hands-on matching activity. Students place each word card next to the correct part of the sunflower diagram, reinforcing all seven part names in a tactile, low-prep center format.
This vocabulary matching mat invites students to place picture, word, and definition cards into the correct spaces on the mat. Built for repeated use, it reinforces sunflower science vocabulary in a hands-on format that works equally well for independent practice and small group review.
Sunflower Parts Vocabulary Cards
These three-part vocabulary cards feature a picture, word, and definition for each of the seven sunflower parts. Students match the cards independently or in pairs, building both science content knowledge and early reading skills. For more free sunflower printables check out our Sunflower Templates!
Teaching the Parts of a Sunflower
A sunflower is one of the most recognizable plants in the world. Each of its external parts plays a specific role in the plant’s survival, growth, and reproduction. When students can name and describe each part, they build a foundation for understanding all flowering plants.
Roots grow underground and anchor the sunflower firmly in the soil. They absorb water and nutrients and send them up through the stem to the rest of the plant. Without strong roots, even a tall sunflower could not stand upright.
The stem is the sunflower’s highway. It carries water and nutrients from the roots up to the leaves and flower head. Sunflower stems are thick and sturdy, sometimes growing more than ten feet tall.
Leaves are broad and flat, covered in tiny hairs that help the plant absorb sunlight. Inside each leaf, a process called photosynthesis converts sunlight, water, and carbon dioxide into food for the plant.
Petals (also called ray florets) form the bright yellow outer ring that makes a sunflower instantly recognizable. Their vivid color attracts bees, butterflies, and other pollinators to the flower.
The flower head is the large circular center of the sunflower. It looks like a single flower, but it is actually made up of hundreds, sometimes thousands of tiny individual flowers called florets packed tightly together.
Ray florets are the petal-like flowers along the outer edge of the flower head. They are usually bright yellow and sterile, meaning they do not produce seeds. Their job is to attract pollinators.
Seeds develop in the center of the flower head as the disk florets are pollinated. A single large sunflower can produce between 1,000 and 2,000 seeds, arranged in a beautiful spiral pattern.
Sunflower Life Cycle Printables
Life Cycle of a Sunflower Chart
This full-color circular diagram walks students through all seven stages of the sunflower life cycle connected by bright yellow arrows. A beautiful reference chart for science walls, student notebooks, and life cycle discussions.
Life Cycle of a Sunflower Cut and Paste
Students cut out seven illustrated stage cards and paste them into the correct spots on a blank circular diagram. This hands-on sequencing activity reinforces the complete sunflower life cycle in an engaging, low-prep format.
Life Cycle of a Sunflower Label Worksheet
Free printable sunflower life cycle labeling worksheet for students to practice writing the correct science vocabulary term for each stage of development. This black-and-white PDF printable is helpful for young students to color and label each of the growth stages of a sunflower: seed, germination, seedling, young plant, bud, bloom, and mature sunflower.
Life Cycle of a Sunflower Worksheet
This printable set includes two variations: a black-and-white life cycle diagram with all seven stages labeled for students to color, and a blank-label version where students fill in each stage name from memory or using the reference chart. Both versions work well for formative assessment and science journals.
Life Cycle of a Sunflower Vocabulary Cards
These three-part cards introduce each of the seven life cycle stages with a picture, word, and definition. Students match or sequence the cards to build a complete understanding of the sunflower cycle from seed to seeds fall.
Teaching the Sunflower Life Cycle
Sunflowers complete their full life cycle in a single growing season which makes them one of the most observable and teachable plants in elementary science. Walking students through each stage builds understanding of how all living things grow, reproduce, and continue their species.
Seed: Every sunflower begins as a small, oval-shaped seed. Protected by a tough seed coat, the seed holds everything the new plant needs to begin growing, it just needs warmth, water, and soil.
Germination: When a seed absorbs water and warmth from the soil, it “wakes up” and begins to sprout. The seed coat splits open, a tiny root pushes down, and a small shoot pushes up toward the light. This is germination.
Seedling: Once the shoot breaks through the soil, the plant becomes a seedling. It has a small stem and its first tiny leaves called seed leaves or cotyledons, these begin capturing sunlight right away.
Growing plant: As the seedling grows, its stem thickens, more leaves appear, and the plant gets taller and stronger every day. During this stage, the sunflower can grow up to one foot per week under ideal conditions.
Bud: A tight green cluster forms at the top of the stem. The petals and florets are protected inside, waiting for the right moment to open. Young sunflowers at this stage still practice heliotropism, tracking the sun from east to west each day.
Bloom: The bud opens into a fully bloomed sunflower with bright petals and a center disk full of florets. Pollinators visit the bloom to collect nectar and pollen, which allows the disk florets to be fertilized and begin forming seeds.
Seeds fall: After the bloom, petals dry and drop away. The center disk fills with mature seeds. Eventually the seeds loosen and fall to the ground or are carried away by birds, squirrels, and the wind beginning the cycle again.
Sunflower Science Experiment
Students get up close with a real sunflower in this hands-on observation sheet. They estimate and count seeds, sketch and describe the seed’s shape and size, identify the spiral seed arrangement, and record one surprising observation. It is a perfect introduction to scientific measurement and estimation skills.
This printable experiment sheet walks students through a structured investigation testing whether sunflower seedlings grow taller in direct sunlight versus indirect light. Students record their hypothesis, follow a step-by-step procedure, make final observations, and write a conclusion.
Sunflower Science Observation Journal
Pair this observation journal with the experiment sheet to track seedling growth over two to three weeks. Students draw their seedlings, record heights in centimeters, and note stem direction at six checkpoints which builds measurement, data recording, and scientific observation skills throughout the investigation.
Teaching the Sunflower Science Experiment
This hands-on sunflower science experiment is designed for students in grades two through four. Students investigate whether sunflower seedlings grow taller and track the sun more actively in direct sunlight versus indirect light, connecting the scientific method to the real plant behaviors they have already studied.
Question:
Does a sunflower seedling grow taller in direct sunlight or indirect light?
Materials:
- 2 sunflower seedlings in small pots with soil
- Ruler or measuring tape
- Pencil
- Experiment sheet
- Observation journal
Procedure:
- Label one pot “Direct Sun.” Place it on a sunny windowsill or outside in full sunlight each day.
- Label the second pot “Indirect Light.” Place it in a location that receives limited or filtered light.
- Each day, measure the height of each seedling in centimeters and record it on the experiment sheet. Note which direction each stem is facing.
- Continue for 2–3 weeks. Record all measurements and sketches in the Observation Journal.
- Compare the final heights and stem directions of both seedlings. Write your conclusion: What did you observe? Was your hypothesis correct?
What To Look For:
The seedling in direct sunlight will grow taller and will visibly turn toward the light source, demonstrating heliotropism. The seedling in indirect light will grow more slowly and show less directional movement.
Conclusion:
Sunflowers use sunlight to produce food through photosynthesis. More sunlight means more energy and faster growth. Young sunflowers also practice heliotropism, slowly turning their stems to follow the sun throughout the day. This experiment gives students a firsthand look at both processes in action, connecting classroom vocabulary to real, measurable results.
Sunflower Facts and Research Printables
Download this colorful printable poster and share ten engaging sunflower science facts with your students. Topics include sunflower records, native origins, seed counts, annual versus perennial varieties, wildlife connections, global oil production, and more. Perfect for hanging near science centers or using as a read-aloud reference.
Two Truths and a Lie: Sunflower Science
Six illustrated cards each present two true sunflower facts and one sneaky lie. The lie is printed in red, making this a teacher-directed game that works beautifully for science centers, morning meeting, and small group review.
This nine-cell research grid sends students on a guided fact-finding mission about sunflowers. Prompts encourage students to research how sunflowers grow, discover wild statistics and records, explore sunflower history, and make connections to art and culture. A great independent research activity for grades two and three.
Sunflower Plant Research Report
Students organize and record their sunflower knowledge in this structured four-section research report booklet covering description, habitat, growth needs, and life cycle stages. A meaningful end-of-unit writing project that combines science content with informational writing skills for early elementary students.
Heliotropism Worksheets
This science anchor chart explains how young sunflowers track the movement of the sun from east to west across the sky each day. The diagram labels the stimulus (sunlight) and the plant’s response, introducing key science vocabulary in a clear visual format for upper elementary learners.
These three-part cards cover four essential vocabulary terms with a picture, word, and definition. Students match or sort the cards to build a solid foundation in plant behavior and stimulus-response science concepts. Teachers! If you are needing more science related worksheets, take a look at our Plant Worksheets!
This printable graphic organizer guides students through a structured research process as they explore heliotropism. Students record what they know, what they want to learn, what they discovered, and new questions they still have.
Sunflowers and the Sun Research Response
This four-section research and drawing response page deepens student understanding of heliotropism. Students draw a sunflower facing east and west, define heliotropism in their own words, explain why sun-tracking helps the plant grow, and connect the behavior to another living thing that responds to sunlight.
Teaching Heliotropism
One of the most fascinating behaviors in the plant world happens quietly in sunflower fields every morning. Young sunflowers slowly turn their stems to face the rising sun in the east and by evening, they have tracked all the way west. This behavior is called heliotropism, and it is a perfect entry point for teaching students about stimulus and response in living things.
heliotropism: the way a young sunflower turns to follow the sun across the sky. The word comes from the Greek words helios (sun) and trope (turning)!
stimulus: something in the environment that causes a living thing to react. For a young sunflower, the stimulus is sunlight and the direction it is coming from!
response: a living thing’s reaction to a stimulus. A young sunflower responds by slowly bending its stem to face east in the morning, follow the sun west during the day, and turn back east overnight!
tropism: any growth or movement in a plant caused by something in its environment. Heliotropism is one type of tropism, caused by the sun!
gravitropism: a type of tropism caused by gravity. It is why roots grow downward into the soil!
hydrotropism: a type of tropism caused by water. It helps roots grow toward the water they need!
mature sunflower: a full-grown sunflower that has stopped following the sun. It faces east for good, where the morning sun warms its flower and attracts more bees!
Sunflower Seeds and Wildlife Printables
Sunflower Seeds and Wildlife Chart
This two-section anchor chart introduces seed dispersal and the sunflower food chain. The top section diagrams three dispersal methods with labeled illustrations. The bottom section maps a simple food chain from sunflower producer to animal consumers, including birds, squirrels, and humans.
Sunflower Seeds and Wildlife Vocabulary Cards
Seven vocabulary terms are presented as three-part matching cards with a picture, word, and definition. These cards support both science content and academic vocabulary development for grades one through three.
Sunflower Seed Dispersal Color by Code
Students color six illustrated scenes using a simple three-color code to classify each method of sunflower seed dispersal. This engaging activity reinforces the three dispersal pathways in a low-prep, visually interactive format.
This nine-cell research grid guides students as they investigate the relationship between sunflowers and the animals that depend on them. Prompts include identifying seed consumers, pollinators, human uses of sunflower seeds, and a draw-your-own food chain activity.
Teaching Sunflower Seeds and Wildlife
When a sunflower’s bloom fades and its petals fall away, a new chapter begins. The flower head fills with hundreds of ripening seeds, and the sunflower becomes one of the most important food sources in its ecosystem. Understanding how seeds travel and which animals depend on sunflowers connects students to the bigger picture of interdependence in nature.
seed dispersal: the way seeds move away from the parent plant to new places where they can grow. Sunflowers spread their seeds in three main ways: by animals, by wind, and by gravity!
animal dispersal: when birds, squirrels, and other animals carry seeds to new places. Goldfinches cling to the sunflower head and pull seeds out one by one, and squirrels bury seeds they sometimes forget to eat!
wind dispersal: when the wind carries seeds away from the parent plant. Sunflower seeds are heavier than dandelion or maple seeds, so the wind can only move them a short distance!
gravity dispersal: when heavy, ripe seeds fall straight down from the flower head to the ground below. These seeds may sprout right next to the parent plant or get carried farther by animals or water!
seed coat: the tough outer layer that covers each seed. It keeps the baby plant inside safe until warmth and moisture tell it the time is right to grow!
producer: a living thing that makes its own food. A sunflower is a producer because it uses sunlight, water, and air to make food!
consumer: a living thing that gets its energy by eating other living things. Birds and squirrels that eat sunflower seeds are consumers, and so are people who eat sunflower seeds or cook with sunflower oil!
pollinator: an animal, like a bee or butterfly, that visits flowers to drink nectar. As it moves from flower to flower, it carries pollen that helps the sunflower make seeds!
Amazing Sunflower Facts
Record Breaker: The world’s tallest sunflower grew over 30 feet tall in Germany, taller than a two-story house!
Speedy Growers: Some sunflowers can grow 8 to 12 feet tall in just one summer.
Morning Greeters: Once a sunflower is fully grown, it faces east for good to soak up the warm morning sun.
Petal Surprise: Each yellow “petal” around a sunflower is actually its own tiny flower called a ray flower.
Nature’s Math: The seeds in a sunflower head grow in spiral patterns that follow a math pattern called the Fibonacci sequence.
Ancient Crop: Native Americans grew sunflowers for food, oil, and dye more than 3,000 years ago.
Two Kinds of Seeds: Black sunflower seeds are mostly used for oil and birdseed, while striped seeds are the ones people usually eat as snacks.
Soil Cleaners: Scientists have planted sunflowers to help pull harmful materials out of polluted soil, including near Chernobyl.
State Flower: The sunflower is the state flower of Kansas, which is nicknamed the Sunflower State.
Bird Buffet: Goldfinches love sunflower seeds so much that they often perch right on the flower head to snack.
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