"I think we all stand on the shoulders of those women who were so ahead of what was happening elsewhere in the world."
When Maxwell was 21 she moved from Wellington to Tauranga, and The Elms became her permanent home until her death in 1949.
The camellias were planted near the chapel on The Elms' site.
Julie Green, a descendant of Maxwell's, said it was a special day.
"This is a tribute to Alice Maxwell ... who ... was a great supporter of great organisations. All through the year, homegrown flowers were sold to raise funds for those charities.
"Alice ensured The Elms was presented as a memorial to the early missionaries."
In 1893, Ms Maxwell signed the petition that led to women winning the vote - making New Zealand the first self-governing nation in the world to do so.
"I believe, if she was alive today, Alice Maxwell would appreciate the presentation of three camellias to commemorate the occasion."
The Elms Foundation chairman Ian Thomas said It was entirely fitting Clark took part in the planting of the camellias - the symbol for Women's Suffrage.
"It's certainly appropriate given that Alice Maxwell resided here and signed the petition in 1893."
Thomas gifted Clark a selection of local books.
Clark was also speaking at a booked-out event titled "Are We There Yet?" at Holy Trinity Tauranga Church tonight.