Same answer as 'How long is a piece of string?'
But scientific literature reports that a 12 m sunflower plant was grown in Padua in 1567.
it is a sun flower
Sunflowers are tall (often reaching or exceeding six feet) and like lots of sunlight.
the titan arum holds the record for the tallest single flower at 9m.
Grass and Sun!
Sun + grass = flower & sun + flower = sunflower
put sun then flower
Flower + Sun
Sun + Flower = Sunflower
It may be because they are heliotropic, meaning they turn towards the sun as it goes through its course in the sky.
The tall yellow flower in the garden is a sunflower
does sun flower seeds make you
just mix flower and sun