Jouan Rius / Large courgette / marrow (Cucurbita pepo) growing in vegetable garden, France, August 2013.

Jouan Rius / Large courgette / marrow (Cucurbita pepo) growing in vegetable garden, France, August 2013.

Cyril Ruoso / Pumpkin (Cucurbita pepo) growing in organic garden tended to by inmates as part of Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA. September 2012.

Gary K. Smith / Wooden trug with freshly harvested home grown green and yellow courgette (Cucurbita pepo) varieties, Norfolk, England UK. July

Pal Hermansen / Variet of Pumpkins and squashes (Cucurbita pepo) Norway, August.

Pal Hermansen / Halloween decorations including pumpkins (Cucurbita pepo) outside house, outskirts of Minneapolis, USA.

Pal Hermansen / Seed of Pumpkin (Cucurbita pepo) on white background

Paul Harcourt Davies / Courgette flower (Cucurbita pepo) Podere Montecucco, Orvieto, Umbria, Italy, August.

Jean E. Roche / Polytunnel with courgettes growing, Cidamos gardens, Alpilles, France, October 2012.

Paul Harcourt Davies / Flowers of Courgette / Zucchini (Cucurbita pepo) - male with stamens visible, in a garden near Orvieot, Umbria, Italy

Gary K. Smith / Small collection of freshly picked home grown vegetables, Tomatoes (Solanum lycopersicum), Courgettes (Cucurbita pepo) and Cucumber (Cucurbita sativus) Norfolk, UK, August

Ernie Janes / Garden marrows (Cucurbita sp) ripening, Norfolk, UK

Gary K. Smith / Woman gardener cutting Courgettes, Norfolk, UK, September

Gary K. Smith / Home grown vegetables, freshly harvested Courgettes (Curcurbita pep ovifera) in wire trug on allotment chair, Norfolk, UK, July

Gary K. Smith / Close up of harvested home grown Chillies (Capscium annum acuminatum) and courgettes, UK, August

Gary K. Smith / Courgettes {Cucurbita pepo} growing in containers in a summer garden, variety 'Tuscany', UK, July

Gary K. Smith / Gardener planting out Pumpkin plants {Curcurbita pepo} 'Kuri' variety on allotment, UK, June

Gary K. Smith / Gardener planting out Pumpkin plants {Curcurbita pepo} 'Kuri' variety on allotment, UK, June

Jose B. Ruiz / Close-up of Pumpkin plant flower {Cucurbita pepo} Spain.

Gary Smith / Freshly harvested organic courgettes {Cucurbita pepo} UK.

Nick Turner / Harvesting Marrows {Cucurbita pepo} Gloucestershire, UK

Nick Turner / Harvesting Marrows {Cucurbita pepo} Gloucestershire, UK

Nick Turner / Marrow plant with large marrow {Cucurbita pepo} Gloucestershire, UK

Nigel Cattlin / Pumpkin (Cucurbita pepo) seeds taken from a fresh ripe pumpkin fruit.

Cyril Ruoso / Pumpkin (Cucurbita pepo) growing in organic garden as part of sustainability in prison program, Stafford Creek Corrections Center, Washington

Kerstin Hinze / Decorative Pumpkins {Cucurbita pepo} "Hokkaido" and "Uchiki Kuri", Germany

Kerstin Hinze / Pumpkins {Cucurbita pepo} "Heart of Gold F1", Germany