Sunflowerseeds - Giant Yellow - Seeds For Kids Ref: SUT140600 Features - A 'wacky' character to encourage children's interest in gardening, Flowering Time - Mid July-September Height - 180-270cm (6-9'), I'm Sunny. Choose a sunny site in the garden with weed free soil. Put each seed into the soil about 13mm (½") deep. Lightly cover with soil and water them well. Help them grow tall by feeding with plant food and watering them when they need it. As the plants grow taller, they may need the support of a strong stick to stop them falling over. Price: £0.99 Quantity: