For over 25 years, our team of garden designers and landscape architects has been seeing things differently. So meet the team! 

Our Team

Ann-Marie Powell with her homegrown sweet peas in her Petersfield garden.

Ann-Marie Powell founded her practice Ann-Marie Powell Gardens in 1999 after travelling the world admiring landscapes, then gaining a distinction in NCH Garden Design & Hard Landscape Studies. Since then she has become one of the UK’s most innovative garden designers, creating ground-breaking and uplifting gardens backed by experience.

Alongside heading her successful studio, she has authored three books on garden design and writes regularly for National magazines and newspapers including The Telegraph, Gardens Illustrated and The English Garden. She has also co-hosted TV coverage of the RHS Chelsea Flower Show and numerous TV gardening shows.

When she’s not working, you’ll find her in her own garden…. or at a festival, theatre, gallery or concert. After all, life is for living.

Click here for Ann-Marie’s full biography.

Mary Guinness of Ann-Marie Powell Gardens, Petersfield, Hampshire

Mary trained at the prestigious KLC School of Design at Hampton Court Palace, graduating in 2016 with a distinction and winning two awards, for Residential Garden Design and the London Stone Award for Construction. Before that, Mary studied at Ryton Organic Gardens (the home of Garden Organic, one of the UK’s leading organic growing charities) and under their expert tutelage, obtained the RHS Certificate in Practical Horticulture (Level 2).

Growing up on a farm in Hampshire, Mary has always loved getting her hands dirty in the garden. Life then went in a different direction; a degree in Biochemistry from Oxford University, followed by a law conversion. But after 10 years practicing as a solicitor specialising in intellectual property, she realised it was her clients who were having all the creative fun, and she knew it was time for a change.

In 2015 she joined Le Cure de France, cycling one and a half times the height of Everest in four days, to raise money for the Royal Marsden’s Cancer Research charity. Two weeks later Mary had handed in her notice and enrolled with KLC, the rest is history! (She has not ridden her bike since.)

Junior Landscape Architect Penny Walker

Landscape Architect Penny grew her first plant when she was just three years old, fast graduating to sweet peas, tomatoes, and runner beans, diligently ‘helping’ in her grandma’s garden too (much of which was spent running around spraying her grandpa with the hose!)

A career in landscape was always her goal, and at just 14 she submitted a design to build a 3x3m garden at Gardener’s World Live in 2014, she and her family growing all her plants, resulting in her being awarded a RHS Bronze Medal. The following year she was invited by the RHS to design another 3x3m garden at the RHS Hampton Court Flower Show and was awarded a coveted RHS Silver-Gilt Medal, all whilst achieving 10 GCSEs alongside!

A Levels, then university were next, and after three years of all-nighters, stress, and far too much pizza, she was awarded a 1st Class Degree BA Landscape Architecture from University of Gloucestershire, followed swiftly by a Masters in Landscape Architecture from the same University – her dissertation focused on mitigating climate change in designed urban spaces.

When not working you can typically find Penny visiting a garden with her camera taking an exorbitant number of photos. Most of which end up deleted!

We see outdoor space as places with exciting possibilities.

Everything we do begins with you and your needs. From design conception, to completion and beyond, our studio is proud of the meticulous attention given to each and every one of our clients’ needs. We have the expertise, experience and ambition to make your vision a reality.

Let’s talk about how we can make your project an exciting reality.


tel: +44 (0) 1730 825650