Fire crews from Methwold, Swaffham and Watton attended Didlington Nurseries garden centre after being called shortly after 1.20am.
The stop message for the fire crews was received at 3.26am, indicating that no further assistance was required.
Relief has been expressed that a whole business did not go up in smoke after emergency services were called in the early hours of Sunday morning.
A social media post by owner Sean Rickard and the team on Monday said a neighbour alerted the emergency services after realising the Field Lodge business was in flames.
The post added: “Thank you for all your kind comments. Fire and police services are still investigating.
“[We] lost new shop, office, public toilet and also the water pump which means no water for the whole site.
“A very quick attendance by firefighters saved the whole nursery. We are not allowed to touch anything yet, but thank you all for your kind concerns.”
A social media post has alerted customers that they can return to the garden centre as work continues to fully recover from the fire.
The post said: “Please bear with us as the place is still a fire scene and is very messy. Work will be in progress to clear the damage , so please take care if you visit us.”
It also thanked the public for their support and offers of help.
“It has boosted their [staff’s] moral, and they promise to give you a great welcome back,” the post said.
Sean Rickard, owner of Didlington Nurseries, said he did not have anything further to say on the fire.
A county council spokesman, speaking on behalf of the fire service, said: “We have checked with Norfolk Fire and Rescue Service and, at this stage, it’s still a police-led investigation.”
Norfolk Police has been contacted for comment and are in the process of sending a response.