"It's a sort of delicious fear," Holmes says. "The feeling that you're lost, when, deep down, you know that you aren't. When a fern frond opens up, you've got this little bit that could be a bed and I used to think, as a child, that it would be fun to curl up inside it.
Although she has taught in the university's School of Music for a decade, Holmes' music is very much informed by her years spent travelling around Auckland schools, encouraging youthful creativity.
"Sometimes, we'd just all grab instruments and do a lot of experimentation. We may have made a hell of a lot of noise but that's the way to do it."
Looking back, she can hear echoes of classroom sonorities in instruments such as the glockenspiel and tubular bells that set the mood of Frond's opening pages.
With school classrooms behind her, Holmes has gone on to enjoy her more ambitious Aquae Sulis making it into the top three scores in the 2013 SOUNZ Contemporary Award, an acknowledgement that, she says, was utterly thrilling.
"When one starts as a community musician, it's easy to become typecast, and that recognition marked how things are slowly changing."
Holmes' orchestral talent owes much to her years spent in the violin ranks of Auckland Youth Orchestra.
"I was very much a quiet observer," she says. "I simply absorbed the whole orchestral thing, as if by osmosis."
Lowdown
What: New Zealand Symphony Orchestra
Where and when: Auckland Town Hall, tonight at 7.30pm; Baycourt Addison Theatre, Tauranga, Wednesday at 7.30pm