"I think we could be doing better in terms of street planting. Dublin St would be a prime example."
Ms Kerr was brought up on a quarter acre section in Wallacetown, near Invercargill. Her parents were keen gardeners and she and her sister had their own little vege plots.
"I was always aware of green life, and spent a lot of time in parks and gardens."
Right through school she knew she wanted to be a landscape architect, and she spent four years studying for an honours degree at Lincoln University.
She's now been working at Springvale Garden Centre in Wanganui for nearly five years, doing everything from designing gardens to driving forklifts.
"I like being on the ground and working with plants, not at a computer as a landscape architect."
She came top in the Nursery and Garden Association nationals in July before competing in the Young Horticulturist event. Elements of that Auckland competition included plant identification, soils and fertiliser, a speech and an Excel spreadsheet exercise.
For the last two months she has been working on a computer programme for novice gardeners. Those involved what they want to grow and the application reminds them when and how to plant and care for the garden.
The Royal Horticultural Society Garden at Wisley, near London, is one of her travel destinations.
In New Zealand, she'd like to see developments along the lines of the Plant Life Balance movement in Australia. It aims to have 20 per cent more urban green spaces by 2020. "I'm really interested to see what we can do about that," she said.