Grow a sunflower

Getting ready

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It will take about 8 weeks for a sunflower plant to grow and flower from a seed. Why don't you make a chart and measure how much it grows each week?

You will need:

  • plastic cup

  • compost

  • garden sunflower seeds

  • plant sprayer (optional)

  • large flowerpot

Step 1

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Put some damp soil in a plastic cup so it comes up almost to the top.

Then poke your finger in the soil to make a hole for your sunflower seed.

Step 2

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Drop a sunflower seed into the hole.

Cover it with a little soil.

Spray or sprinkle some water on top.

Step 3

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Put the cup on a sunny windowsill.

You could plant a seed in some more cups too if you like, to see which one grows best.

Spray the soil with water whenever it feels dry.

Can you think of a scientific investigation you could do using your sunflower seeds?

Step 4

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Your plant should pop up through the soil after about 1 or 2 weeks.

You can now start measuring how much it grows each week.

Step 5

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When your plants grow too big for the cups, plant them in bigger flowerpots.

You could put the pots in a sunny spot outside.

Step 6

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Your plant should flower after about 8 weeks.

Step 7

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When the sunflower heads start to turn brown, cut them off and hang them somewhere dry and airy. When the seeds are dry, rub them together to loosen them.

Birds can eat your seeds if you leave them in the garden. You could even put them in a bird feeder. Save a few to grow more sunflowers!

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