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How to Grow a Sunflower

Here is all you need to know to grow a sunflower!

Plant the seeds now and it will grow tall and pretty for Summer!

Sunflower under a blue sky

You can enter the Lets for Life Tallest Sunflower Contest this summer by growing your own plant and sending us a picture of your Sunflower! 

What you will need

A Plastic Cup



Sunflower Seeds

Garden Sunflower Seeds

(not the ones for eating!)

Plant Pot

A Large Flower Pot

Spray Bottle

Plant Sprayer


What to do

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

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

Poking a sunflower seed into a plastic cup filled near the top with soil.

Drop a sunflower seed into the hole. 

Cover it with a little soil. Spray or sprinkle some water on top.

Spraying dry soil with a water spray bottle.

Put the cup somewhere sunny, a bright windowsill would be perfect. 

Spray the soil with water whenever it feels dry.

Sunny windowsill is perfect for the plastic cup with seed to be placed.

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!

Measuring the sunflower with a ruler

When your plant grows too big for the cup, plant it in bigger flowerpots.

You could put the pots in a sunny spot outside or on a windowsill.

Sunflower in a pot in a sunny garden.

Your plant should flower after about eight weeks!

Once it has stopped growing, send us a photo and the final measurement to enter the Sunflower Contest. 

Sunflower in flower in the sunny garden
7. Bonus

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!

Dried Sunflower with Seeds