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      Plant health and growth

      Lesson details

      Learning outcome

      You can observe and record different stages of plant growth.

      Key learning points

      1. Plants need water, light and a suitable temperature (warmth) in order to grow and stay healthy.
      2. Healthy plants grow strong and upright. The leaves are firm and flowers fruit and root systems are well formed.
      3. An unhealthy plant can be dry, dull, brown or yellow in colour and unable to stand upright.
      4. The growth of plants over time can be observed and recorded in different ways.

      Keywords

      • Plant - A plant is a living thing that often has roots, stem and leaves

      • Unhealthy - A plant becomes unhealthy when it does not have everything it needs

      • Wilt - A plant will wilt when it can no longer stay upright. Often the stem becomes floppy

      • Observe - When we observe, we look closely with our eyes, and use other senses

      • Record - We record in science to keep information so that it can be looked at again

      Common misconception

      Pupils may think that we observe using only our eyes

      Show how we can use other senses to observe, we might listen, smell or touch when we observe

      Teacher tip

      Pupils will use the plants they have grown from seeds in lesson 1. They will have set up this investigations in lesson 3. In this lesson, they are planning what to observe and how to record any changes in plant growth over subsequent lessons.

      Equipment

      Pupils will need cameras, ipads, drawing materials etc. in order to record in their chosen ways

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which of these is not part of a plant?

      roots
      Correct answer: soil
      stem
      leaves
      flower

      Q2.
      Plants need water, warmth and to grow and stay healthy.

      An image in a quiz
      Correct Answer: light, sunlight

      Q3.
      What does the temperature of something tell us?

      Correct answer: How hot it is.
      How light it is.
      How wet it is.

      Q4.
      What would you use to measure the temperature of something?

      magnet
      ruler
      Correct answer: thermometer

      Q5.
      What does it mean when scientists observe things?

      They ask questions.
      Correct answer: They look closely.
      They write things down.

      Q6.
      Starting with 'start with a healthy plant', order these instructions for growing a plant with no warmth.

      1 - Start with a healthy plant.
      2 - Put the plant in a cold room.
      3 - Wait for two weeks (remember to water the plant).
      4 - Observe the plant to see if there are any changes.

      6 Questions

      Q1.
      Plants need , warmth and light to grow and stay healthy.

      Correct Answer: water

      Q2.
      Which of these is not a good reason why my sunflower grew most in July?

      An image in a quiz
      The plant got more light in July.
      Correct answer: The plant got more wind in July.
      The plant got more warmth in July.

      Q3.
      Which statement about healthy plants is true?

      Correct answer: The leaves are green.
      The leaves are brown.
      The leaves are yellow.

      Q4.
      What word is used when a plant becomes droopy and floppy?

      An image in a quiz
      welt
      walt
      Correct answer: wilt

      Q5.
      Which of these things could you observe to decide if a plant is unhealthy?

      The colour of the plant pot.
      Correct answer: The colour of the leaves.
      The colour of the watering can.

      Q6.
      Match the tools with the different ways of recording when we investigate.

      Correct Answer:camera,photo or video

      photo or video

      Correct Answer:pencil,drawing or sketch

      drawing or sketch

      Correct Answer:squared paper,graph or chart

      graph or chart


      To help you plan your 2 science lesson on: Plant health and growth, download all teaching resources for free and adapt to suit your pupils' needs...