Several out-of-town nurseries, Masterton businesses and the Mayor of Masterton Garry Daniell had offered the company the use of a forklift or a tractor, Mr Hatchard said.
And his granddaughter Jade Bradnock, 6, had pitched in, handing him a $20 note to help out.
"I'm not going to spend that $20 - it's special.
"So are all those people who have offered equipment and help," Mr Hatchard said.
"This is where you find out who your friends and supporters are and it's touching really that so many businesses, individuals and customers are being so kind."
Mr Hatchard said GardenBarn had undergone significant expansion and rebranding two years ago and he planned to rebuild on the same site another production, staff and storage facility with dimensions similar to the structure that was gutted in the blaze on Sunday.