Rigg-Zschokke, Hiremax, Hireshop and Tumu donated goods and equipment.
The Eastern and Central Community Trust also donated $4000 and landscape designer Paul Gadsby donated his time to manage the project.
"They have all come to the party," said Suzie Adamson, general manager Wairarapa Hospice.
"It's unbelievable.
"They [Fulton Hogan] have been working hard all morning, non-stop, they have been the Christmas fairies.
"This is what community is about, people giving their time and their resources to people who are going through hard times."
The hospice will start fundraising and is seeking sponsorship for the second stage of the garden to finish the pergola, do the planting, put a fountain in and create outdoor seating for patients.