Alan Summers interview with the Sonic Boom magazine:
Negative space in haiku:
is an article in progress for my book Writing Poetry: the haiku way.
Often when we talk to each other we don't feel the need to spell everything out; we have so many connections in common after all. It's partly the same with haiku, and carrying that over is an effective device. Alan Summers
"There is always the verbal equivalent of negative space in good haiku…" Violette Rose-Jones
Here’s one from Jean Jorgensen from The Touch of a Moth: 35th Annual Haiku Canada Members' Anthology, page 115
to another – fisherman
mending his nets
Negative space needn't always be just the use of white space in breaking up the visible text. It can be the way that a haiku uses its two parts to approach a subject by not directly mentioning it.
Haiku need not name the subject/topic directly.
Stella Pierides has this to say about negative space in haiku:
Is it a case of leaving something out, or not over-filling the small haiku?
is a potent device in haiku.
From the Strange Bed haibun
I'm a haiku writer who feels honoured if a reader adds their own life experiences to a poem of mine, that maybe only shows half a story, in order for it to be completed by someone else.
Complementary to negative space is my white echoes and implication article where I talk about white paintings amongst other things:
Anthology credits: The Humours of Haiku ISBN 978-0-9565725-4-7 (Iron Press 2012); Faces and Place ed. Don Baird (The Little Buddha Press 2015); naad anunaad: an anthology of contemporary international haiku ed. Shloka Shankar, Sanjuktaa Asopa, Kala Ramesh (India, 2016)
From the Sonic Boom INTERVIEW: