X Tables
Garden Maths

Sunlight Hours maths mission

A junior real-world challenge using sunlight hours to practise time without feeling like a worksheet.

Quick answer

You can use sunlight hours to plan your garden by working out how long your plants get sun each day, and how to best arrange them to make sure they grow well.

Learning outcome

By the end of this page, you will be able to use time and sunlight to plan where to plant your garden flowers or vegetables, and understand how much sun different plants need. Success signs:
  • You can read a clock and tell the time to the hour and half-hour
  • You can add up hours to find total sunlight
  • You can compare how many hours different plants need
  • You can make a simple garden plan using time and sunlight

Why this matters

Sunlight hours help you plan a garden that will grow well. Just like you need to know how long you have to play or eat lunch, plants need to know how many hours of sunlight they get each day. Some plants love sun, some like shade, and some like a mix. Knowing this helps you grow the best garden!

How it works

To plan your garden using sunlight hours, you:
  1. Find out how many hours of sunlight each plant needs
  2. Look at your garden to see how many hours of sun each spot gets
  3. Match plants to spots based on sunlight needs
  4. Make a simple garden plan

Examples you can see

Let’s imagine you have a garden with different spots. Here’s how you might work out the sunlight hours for each spot: Spot A: Gets sun from 8am to 12pm = 4 hours Spot B: Gets sun from 10am to 4pm = 6 hours Spot C: Gets sun from 9am to 11am = 2 hours Now, let’s say you want to plant three types of plants:
  • Tomatoes: Need 8 hours of sunlight
  • Lettuce: Need 4 hours of sunlight
  • Shade-loving ferns: Need 2 hours of sunlight
So you would plant:
  • Tomatoes in Spot B (6 hours) – but you need 8 hours, so you might need to move them or give them extra sun
  • Lettuce in Spot A (4 hours) – perfect!
  • Ferns in Spot C (2 hours) – perfect!

Try it as a mini adventure

Adventure: The Sunlight Garden Mission You are the gardener in charge of a new garden! You have a sunny spot, a shady spot, and a partly sunny spot. You need to plant:
  • 5 sun-loving sunflowers
  • 3 shade-loving impatiens
  • 4 mixed-light begonias
Your garden has 3 spots:
  1. Spot 1: Gets sun from 7am to 12pm = 5 hours
  2. Spot 2: Gets sun from 9am to 3pm = 6 hours
  3. Spot 3: Gets sun from 11am to 2pm = 3 hours
You have to match the plants to the spots based on how much sun they need:
  • Sunflowers need 8 hours
  • Impatiens need 2 hours
  • Begonias need 4 hours
  1. 4th time: Which spot should you plant the sunflowers?
  2. 5th time: Which spot should you plant the impatiens?
  3. 6th time: Which spot should you plant the begonias?

Common mistakes

  • Mistake: Thinking 12pm is 12 hours of sunlight. Why it happens: Confusing time of day with number of hours. Fix: Remember that 12pm is noon, not 12 hours. Count from morning to afternoon.
  • Mistake: Adding up the times wrong. Why it happens: Not counting carefully. Fix: Use a clock or draw a number line to help count hours.
  • Mistake: Not checking if a plant's sun needs match the spot. Why it happens: Rushing or guessing. Fix: Read the plant needs carefully and match them to the right spot.

Parent and carer guide

Parents and carers can help by:
  • Using a real garden or a drawing of one to practice
  • Letting the child count hours on a clock or with a number line
  • Checking that the child understands how to count from one time to another
  • Encouraging the child to make a simple garden plan using sunlight hours
  • Playing a game: "What if we moved this plant to another spot?"
What to say:
  • "Let’s look at the sun and see how long it shines in each part of the garden."
  • "Can you tell me how many hours the sun is on this spot?"
  • "Which plant needs the most sun? Which needs the least?"
What not to worry about:
  • It's okay if they make mistakes – that's how we learn!
  • Don't rush the process – it's more important to understand than to be fast.

Practice questions

  1. Spot X gets sun from 6am to 10am. How many hours of sunlight is that?
  2. Spot Y gets sun from 8am to 4pm. How many hours of sunlight is that?
  3. Plant A needs 3 hours of sun. Spot Z gets sun from 10am to 1pm. Is this enough?
  4. Plant B needs 6 hours of sun. Spot W gets sun from 9am to 2pm. Is this enough?
  5. Spot V gets sun from 11am to 5pm. How many hours of sunlight is that?
Answers:
  1. 4 hours
  2. 8 hours
  3. Yes, it is enough (3 hours needed, 3 hours given)
  4. Yes, it is enough (6 hours needed, 5 hours given – but close!)
  5. 6 hours

FAQ

What is sunlight hours?

Sunlight hours are how long the sun shines on a spot in your garden each day, measured in hours.

How do I measure sunlight hours?

You can look at a clock and count from when the sun starts shining to when it stops.

Why do plants need different amounts of sunlight?

Plants grow differently. Some need lots of sun to make food, some need shade, and some like a mix.

Can I use sunlight hours to plan a garden with flowers and vegetables?

Yes! You can use sunlight hours to decide where to plant each type of plant.

What if I don’t have a garden?

You can still practice with a drawing of a garden or even a toy garden with blocks or toys.