Sunflower Scientists: Grow a Sunflower from Seed

Materials Needed

• Sunflower seeds, preferably untreated and labeled for planting
• Small pot, recycled container, or garden space with drainage
• Potting soil
• Water
• Ruler
• Craft stick or plant label
• Pencil, colored pencils, or markers
• Science journal, notebook, or digital document
• Optional: magnifying glass, calendar, measuring tape, tablet or camera
• Optional: clear plastic cup for observing roots

Lesson Overview

Age: 11 years

Time: 45–60 minutes for the lesson, followed by 5–10 minutes of plant care several times each week

Learning area: Science, nature study, measurement, observation, and practical life skills

Learning Objectives

By the end of the lesson, the learner will be able to:

• Identify the basic needs of a sunflower: light, water, air, warmth, nutrients, and space.
• Describe at least three stages in a sunflower’s life cycle.
• Plant a sunflower seed using the correct steps.
• Make and record observations using drawings, labels, numbers, or speech-to-text.
• Measure the plant’s growth and use the information to notice patterns.

Success Criteria

I can:

• Explain what a seed needs to begin growing.
• Plant my seed at the correct depth and give it suitable care.
• Make a clear observation using words, drawings, labels, photos, or audio.
• Measure my sunflower carefully and record the result.
• Explain how my plant changes over time.

Key Vocabulary

• Seed: A young plant inside a protective covering.
• Germination: When a seed begins to grow.
• Root: The part that usually grows downward and takes in water.
• Stem: The part that supports the plant and carries water.
• Leaf: The part that uses light to help the plant make food.
• Bud: A closed flower that has not opened yet.
• Observation: Information gathered by looking, measuring, touching carefully, or listening.

Introduction: Hook and Objectives

Hook: “The Giant Plant Challenge”

Show the learner a sunflower seed and ask:

• “How can something this small become taller than a person?”
• “What do you think is hiding inside this seed?”
• “What might happen if the seed gets no water or no light?”

Allow the learner to examine the seed with a magnifying glass or by touch. Invite a prediction:

“I predict the seed will need __________ because __________.”

Explain: “Today, you will become a plant scientist. You will learn how sunflowers grow and plant a seed that you will care for and measure over time.”

Background Science

Sunflowers begin as seeds. When a seed has enough water, warmth, and air, it may begin to germinate. A small root usually appears first. Then a stem pushes upward and leaves open. As the sunflower grows, it needs light, water, nutrients, and room for its roots. Eventually, many sunflower plants produce a flower head containing more seeds.

Sunflowers do not eat soil or drink sunlight. Their roots take in water and minerals from the soil. Their leaves use light, water, and carbon dioxide from the air to make food. This process is called photosynthesis.

Body: I Do, We Do, You Do

Part 1: I Do — Teacher or Adult Demonstration

Time: 10 minutes

Use a real seed and a pot to model the planting process. Say each step aloud while showing it:

1. Choose a container with a drainage hole.
2. Fill the container with slightly damp potting soil.
3. Make a hole about 2–3 centimeters deep, or about twice as deep as the seed is wide.
4. Place one sunflower seed in the hole with care.
5. Cover the seed gently with soil.
6. Water slowly until the soil is damp, but not muddy.
7. Place the container where it will receive plenty of sunlight.
8. Label the container with the plant’s name and the planting date.

Model how to measure the plant later: place the ruler at the soil line and measure straight up to the tallest part of the plant. Explain that the measurement should be made in the same way each time.

Quick Check

Ask the learner to show or tell:

• “How deep should the seed go?”
• “Why does the pot need a drainage hole?”
• “Where will you place the pot?”

Part 2: We Do — Explore and Plan Together

Time: 10–15 minutes

Activity A: Seed Detective

Work together to examine the seed. The learner may draw, point, speak, type, or use labels to describe it.

Discuss:

• What color and shape is the seed?
• Is the seed smooth, rough, hard, or soft?
• What clues suggest that it is alive?
• What does the seed need before it can begin growing?

Activity B: Put the Life Cycle in Order

Say or write these stages on separate cards:

1. Seed
2. Germinating seed
3. Seedling with leaves
4. Tall plant
5. Flower
6. New seeds

Ask the learner to arrange the stages in order. The learner may use physical cards, a digital drag-and-drop activity, or numbered drawings.

Think-Pair-Share option: The learner thinks of one change between two stages, explains it to an adult or partner, and then shares the idea aloud.

Activity C: Make a Care Plan

Together, decide:

• Where will the sunflower receive sunlight?
• Which days will the learner check the soil?
• How will the learner know whether the plant needs water?
• Where will measurements be recorded?

Explain that the soil should be checked with a finger. If the top layer feels dry, the plant may need water. If it is still damp, wait and check again later. Avoid giving the plant too much water.

Part 3: You Do — Plant the Sunflower

Time: 15–20 minutes

Invite the learner to complete the planting steps independently, with help when needed.

Planting Directions

1. Choose and label the container.
2. Add potting soil.
3. Make a small planting hole.
4. Place the seed in the hole.
5. Cover the seed gently.
6. Water the soil slowly.
7. Place the pot in a bright, safe location.
8. Record the planting date.

After planting, ask the learner to choose one creative name for the sunflower, such as “Sunny,” “Rocket,” or “Gold Star.”

Sunflower Observation Journal

The learner should observe the plant every day or every other day. A complete journal entry may include any combination of writing, drawing, photographs, voice recordings, labels, stickers, or speech-to-text.

Observation Template

• Date: __________
• Plant height: __________
• Number of leaves: __________
• Soil: dry / damp / wet
• What I notice: __________
• My question or prediction: __________
• Drawing, photograph, or voice note: __________

Encourage the learner to measure the plant two or three times each week. At the end of each week, compare the measurements and discuss whether the plant grew, stayed the same, or changed in another way.

Formative Assessment During the Lesson

• Ask the learner to name two things a sunflower needs.
• Ask the learner to demonstrate the correct planting depth.
• Ask the learner to put the sunflower life-cycle stages in order.
• Ask the learner to explain why the container needs drainage.
• Ask the learner to show how the plant will be measured.

Real-World Application

Explain that gardeners, farmers, and scientists use observation and measurement to care for plants and improve how they grow. A gardener might measure height, compare sunlight levels, or test how much water different plants need.

Optional investigation: Plant two sunflower seeds in separate containers. Give both the same soil and water, but place one in a sunny area and one in a less sunny area. Predict what may happen. Measure both plants and compare them. Do not place a plant in complete darkness for an extended time.

Differentiation and Accessibility Supports

For a Learner with Dyslexia

• Read directions aloud and provide short, numbered steps.
• Use clear sans-serif print, large spacing, and bold keywords.
• Preteach vocabulary with real objects, gestures, and simple definitions.
• Allow the learner to answer orally, point to choices, use audio recordings, or use speech-to-text.
• Use seed, root, stem, leaf, and flower cards for hands-on sequencing.
• Repeat important information in more than one way: spoken, visual, and hands-on.

For a Learner with Dysgraphia

• Offer a journal with sentence starters, checkboxes, and wide spaces.
• Allow drawing with labels instead of long written paragraphs.
• Use a keyboard, tablet, speech-to-text, or adult scribing.
• Let the learner place number cards on a growth chart instead of copying numbers.
• Reduce copying and focus on scientific thinking rather than handwriting speed.
• Provide a ruler with clear markings or use a measuring tape with adult support.

Extra Scaffolding

• Use a visual checklist with one step per line.
• Complete the first step together before asking the learner to continue.
• Use “first, next, then, last” language.
• Provide sentence starters such as “I notice…,” “I wonder…,” and “The plant needs…”

Extension for Advanced Learners

• Calculate how many centimeters the sunflower grew each week.
• Create a line graph of the plant’s height.
• Research why sunflowers turn toward light when they are young.
• Compare two varieties of sunflower and predict which may grow taller.
• Write or record a short “plant scientist report” about the sunflower’s progress.

Summative Assessment: Sunflower Scientist Demonstration

At the end of the growing project, the learner will give a short presentation, voice recording, poster, digital slideshow, or conversation that includes:

• The sunflower’s life cycle in the correct order.
• At least three things the plant needed to grow.
• At least two observations about changes in the plant.
• One measurement or comparison from the growth record.
• One challenge and how the learner responded to it.

Simple Rubric

Conclusion: Closure and Recap

Return to the opening question: “How can a tiny seed become a tall sunflower?”

Invite the learner to complete these statements aloud, by writing, drawing, or recording:

• “A sunflower seed needs…”
• “The first part that usually grows is…”
• “I planted my seed by…”
• “One thing I will observe is…”

Finish with the key idea: Plants grow through a life cycle. Sunflowers need suitable light, water, air, warmth, nutrients, and space. Scientists learn by observing, measuring, recording, and asking questions.

Ongoing Care Reminder

• Check the soil regularly rather than watering automatically.
• Give the plant bright sunlight.
• Turn the pot occasionally so the stem does not lean too far in one direction.
• Move the sunflower to a larger container or garden space if its roots need more room.
• Continue observing until the flower opens and new seeds develop.