Blooming High Street Sunflower Success

From seedlings great things can grow

In April I was one of the happy recipients of Most Easterly's great seed giveaway.

A sunflower seedling, a strapping 2cms of natural power. I re-potted it, and put it on my window-sill.

It's now over a metre tall, and two days ago the flowerhead started to develop. 

"It is a form of Fermat's spiral. The angle 137.5° is related to the golden ratio (55/144 of a circular angle, where 55 and 144 are Fibonacci numbers) and gives a close packing of florets." (Wikipedia)