Garden Design
Frances Costelloe is an artist, illustrator and garden designer specialising in planting design, running a bespoke garden design practice based in North London.
She brings an artist's eye and a lightness of touch to hard landscaping, with the primary focus always on planting. Frances creates biodiverse, beautiful gardens that bring nature closer, encouraging life spent outdoors. The practice focuses on compact London gardens, bringing energy to unloved spaces while making them both planet and child-friendly.
Design Philosophy
Planting First Every garden starts with planting, not layout. Structure, hard landscaping, and materials all serve the planting, not the other way round.
An Artist's Eye Years of drawing, looking and creating inform how Frances composes a garden: colour relationships, texture, rhythm, line and the negative space that is essential to any garden.
Beautiful and Biodiverse Gardens should feed the soul as much as the ecosystem. Beauty and biodiversity aren't a trade-off: layered planting that supports pollinators and birds also gives the richest colour, texture, and seasonal interest. A no chemical after care plan will always be recommended.
Small London Gardens The focus is compact, often overlooked urban plots. These spaces need the most care to work hard for their size, and are the most rewarding outdoor rooms when they do.
Planet and Child-Friendly Low-impact materials, planting chosen for resilience, and gardens that are genuinely usable by families, not just photogenic.
Work & Qualifications
Planting Design Diploma, London College of Garden Design, Kew Gardens, Distinction
Certificate in Plantsmanship, London College of Garden Design, Kew Gardens, Distinction
Practical Horticulture Certificate Level Two, Capel Manor
Diploma in Garden Design, British Academy of Garden Design
Creative Projects Manager Part Time at Jinny Blom Studio
Freelance planting design for leading London garden designers
Haringey Garden
A garden with hard landscaping already in place but no planting. The brief was to soften the space and create a sanctuary for a young couple.
Frances built the planting structure around small trees and shrubs first, using evergreens, ferns, and grasses for year-round form, with perennials layered in for flower and seasonal interest.
The garden is relatively low maintenance, though Frances visits every two to three weeks in the growing season to edit and refine the space, and it has improved year on year. After care is essential to making sure any garden flourishes and develops. The ongoing challenge is drought and watering, particularly in containers, where plants can't draw down to groundwater, so reducing the garden's water needs is an active piece of work.
“When I first got my house, the garden was completely empty and lifeless, and I had no idea what to do with it. I didn’t know where anything should go, which plants made sense, or even what I liked. Then Frances came into my life and, with enormous patience, knowledge and care, opened the door to a world I hadn’t realised I was missing. Now, every morning before anyone wakes, I go outside with a coffee, watching the birds and bees busy themselves among the plants. Frances hasn’t simply transformed my garden into somewhere beautiful and alive, she's taught me how important it is to have a little patch of life to call your own. It has been fascinating to learn from her, and I couldn’t recommend her more highly.”
—Gabriel, Haringey
A Personal Garden
A small, neglected courtyard, south-west facing, so sunny, but enclosed by fencing on all sides.
Frances transformed the tired decking by paving using reclaimed London brick laid in a herringbone pattern, unifying the space with a single material. The fences were replaced and painted in Copper's Earth (Jinny Blom x Mylands), a colour that reads as an off-white with shifts toward purple, grey, and murky brown depending on the light, an ideal backdrop for plant texture and colour.
Planting began with structural evergreens such as Pittosporum, alongside kitchen herbs including Rosmarinus officinalis (rosemary) and Laurus nobilis (bay) for practicality. A multi-stem Amelanchier provides tree structure. Grasses and ferns have since been layered in, with further work planned on variation in texture and form, along with stronger seasonal colour. A seasonal bulb scheme adds essential interest in the darker months. Tulips form a key addition and are used as cut flowers for artwork creation.
Next steps: growing more food in the beds, making better use of the sun, and moving the planting toward greater drought tolerance, inspired by Beth Chatto.
Finsbury Park Garden
An already established, low-maintenance garden, with gravel and level changes in place before Frances arrived. The brief here was privacy: the garden was very overlooked by neighbouring properties.
Frances introduced pleached trees for structural, evergreen screening, and greened up the boundary walls and fences with trellising for additional privacy.
She continues to consult on the garden, introducing plants and building interest. However, it needs to stay very low maintenance as the clients are away a great deal.
How We Work
Projects begin with an initial enquiry by email: photographs of the garden, a site plan where available, and a sense of aims and budget. This leads to a site visit and consultation, then a design proposal covering layout, planting, and materials, tailored to the brief.
For build and planting, Frances works alongside trusted contractors and oversees the process on site. Aftercare and seasonal editing continue afterwards, as shown in the case studies above, gardens are rarely finished, they're maintained and developed over time.
Frances also consults on purely planting design projects for clients across London and the South East.
For all enquiries: info@francescostelloe.co.uk
All Images: Tom Mannion
Contact
Frances Costelloe
info@francescostelloe.co.uk
London