United Lincolnshire Hospitals Trust Chief Executive Andrew Morgan planted the tree in the hospital grounds earlier today.
The Trust plans to plant a tree in all its hospitals in memory of Captain Sir Tom Moore and everyone affected by Covid-19.
Mr Morgan says in an open letter of thanks to all who have supported the trust and to his team: “I want to pay tribute to all of the teams, wards and departments across the entire Trust for everything they have done this year.
“I think it is fair to say that this has been the most challenging year ever experienced in the history of the NHS and the way teams have pulled together has been nothing short of incredible. The resilience, teamwork and compassion shown by everyone has made me even more proud to work for the NHS, than I already was.
“I also want to thank the people of Lincolnshire for helping us. We know how valuable NHS services are and without you supporting us in a whole host of ways, I cannot begin to imagine how much more difficult the last year would have been.”