Hatfield Nursing Home has been rated as "requires improvement" following a visit by the Care Quality Commission.
The site in Tamblin Way was inspected back in February, with the CQC finding their responsiveness and effectiveness to be "good", but that safety, care and leadership required improvement.
The report said "five people told us that at night, staff were rude and at times refused to support them or did not respond to their calls", while concerns were raised about "a staff member's approach to a person".
The CQC also found "there had been recent safeguarding concerns raised at the home", and that "while training and guidance had been provided, people were still experiencing the negative approach of some staff".
Get more stories like this delivered to your inbox every week by signing up to the Welwyn Hatfield Times In Brief newsletter.
Concerns were also raised about the repositioning of residents, with the report stating: "From December to present 12 different people had been recorded with some type of wounds.
"The types of wounds included skin tears, moisture lesions, rashes, and category 1-2 pressure ulcers, inflammation and blanching on skin.
"On reviewing repositioning charts there were frequent gaps in positions being recorded."
Following the publication of the report, Gold Care Homes, which operates Hatfield Nursing Home, have pledged to "work tirelessly to implement high standards" for residents.
"At Gold Care Homes, the safety and wellbeing of residents is always our first priority," said a spokesman.
READ MORE: Countdown begins to Welwyn Garden City World Food Festival
"As a responsible care provider, our staff work hard every day to enhance the lives of our residents by bringing them joy, happiness and fulfilment.
"Gold Care Homes acquired Hatfield Nursing Home in September 2022 and have been working tirelessly with all parties involved to implement the high standards that we hold ourselves too and are continually met.
"We are immensely proud of the care that our staff provide to our residents and the incredible outcomes that are achieved in the communities we serve.
"We regret that at the time of the inspection, we had not been able to evidence all of the improvements made and continue to work closely with our staff, residents and community partners to provide assurance that these steps taken continue to be sustained for the future."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here