Just south of here is Campo de'Fiori, with its food and flower market.

BBC: A perfect day in Rome

Food- and flower-sellers, supplicants and beggars depend for their livelihood on its visitors.

ECONOMIST: Death in Lahore

The next Challenge, which kicked off last week, is tackling urban agriculture, a radical approach to growing our food inside our cities (think more skyscraper farms than flower box herb gardens, although the project will address both).

FORBES: Imagining Skyscraper Farms

Shops are flooded with cherry blossom merchandise and food, the colour pink suddenly popping up in decorative garlands and flower-shaped sweets.

BBC: K��y��: Japan��s autumn explosion of colour

In the flower beds, coneflowers such as echinacea and rudbeckia turn into food as the blooms go to seed this time of year.

WSJ: Giving Birds a Refuge--WSJ Weekend Gardener

At some flower-strewn Roman feasts, rose petals were sprinkled on the food, the table, and all over the banquet hall.

NPR: Robb Walsh: 'Are You Really Going to Eat That?'