Artist Sarah Graham's London home and studio

From her studio in Chelsea, Sarah Graham creates magnificent pictures of exotic plants, flowers and insects, which have been inspired by her lifelong fascination with the natural world

She returned to London to work with legendary Pimlico Road antique dealer John Hobbs. 'He was quite scary, but his enthusiasm and exuberance were infectious. He thought big and sold gigantic marble-top tables from Italy and breakfront bookcases from English country houses.' She found the lifestyle intoxicating and enjoyed the financial security, but her desire to paint remained. So, after three years, she quit the job to become a full-time artist, rented a studio in the freezing cold (now demolished) Great Western Studios in Paddington, donned a boiler suit and switched on Radio 4 to keep her company.

With no formal representation or gallery and only the encouragement of her boyfriend, the art dealer James Holland-Hibbert, 'it took a steely nerve to persist'. After nine months of studio work, she borrowed from the bank and gambled all her chips by investing in a stand at a House & Garden fair, where she showed eight large charcoal drawings of sunflowers and artichokes. To her amazement and joy, Ken Bolan from Talisman bought the lot in the first five minutes.

Ten years and nine shows later, she is Mrs Holland Hibbert, living in west London with two little girls, Daisy and Molly, surrounded by the couple's shared acquisitions. Furniture by father and son Chester and Toby Jones sits among Oceanic sculpture, contemporary drawings by Glenn Brown, period furniture and lighting by Serge Mouille. A shelf in the drawing room is crowded with glass boxes containing scorpions, tarantulas and a snake skeleton, all interspersed with photographs of the girls.

Every weekday, after Sarah has dropped off Daisy and Molly at school, she will race to the studio in Chelsea's Glebe Place to get back into the drawing she had to leave the previous evening. 'It is highly addictive and requires total absorption. Eight hours alone each day can be torture, but then there is that euphoric moment when something has worked. When it hasn't, you have to be tough on yourself and keep going.' Some days, she admits, she needs a break and goes to lunch at the Chelsea Arts Club with other artists.

Originally, Sarah worked with charcoal on brown paper: 'It was cheap and sold in large rolls, enabling compositions of unlimited scale.' Now she draws on handwoven calligraphy paper in graphite and ink from plants and fish; the brown ink is from birch, the purple from elderberries and the green from a plant called dyer's broom (Genista tinctoria), which is extracted by artists' material supplier Pip Seymour in Yorkshire. 'The sepia, made from cuttlefish, has a distinctive smell,' Sarah explains. 'Ink is a merciless medium - once it's on the paper it's there for good. But I love how it dries, often in uneven pools. Both the mistakes and the variables become part of the work.'

Field work could be a trip to Hackney to visit the Viktor Wynd Museum of Curiosities, Fine Art & Natural History. Closer to the studio, Sarah spends hours looking through the entomology archives in the Natural History Museum, where approximately 10 million beetles are ranked in drawers beneath the arches of Alfred Waterhouse's neo-romanesque building.

Weekends are spent at the family's house in Wiltshire. 'I don't really garden. I am afraid I'm not naturally a nurturing person, although having children has made me more so,' says Sarah. The weekends are her chance to focus exclusively on Daisy and Molly. 'I endeavour to teach them as much about the natural world as my father taught me.' A treat is to accompany James to auction-house sales in New York and smaller private views in European cities. Museums, markets and book or print fairs are added attractions. 'I seek out any shop selling taxidermy and unusual objects when I travel. In Paris, I always make a beeline to Deyrolle on rue du Bac. On rue de l'Université, I once bought a full human skeleton of "unknown provenance",' she says with a laugh. 'I realise how lucky I am. I feel that painting makes me a better mother and having children makes me a better painter'.