How to make a hardy perennial

Just one milligram of the sex drug Viagra can give wilting flowers another week of life, according to UK TV gardener David Domoney.

The Daily Telegraph quoted him as saying "you only need a tiny amount of Viagra to stiffen things up nicely".

"Viagra contains nitric oxide - which slows down the dying process in plants. The same chemical relaxes the muscles in a man's penis - allowing the blood rush which is how Viagra perks things up in men, too.

"We are very similar to plants - our genetics are compatible in many ways," Domoney said.