Mr Corsellis said: "The Crown suggest that the number and the extent [of injuries] found rule out any realistic suggestion that Jeremy Rickards had suffered a tragic accident or indeed that these wounds were self-inflicted.
Maureen Rickards, 50, allegedly knifed husband Jeremy, 65, in the chest and through the heart at home in Canterbury, Kent.
Canterbury Crown Court heard Rickards then wrapped her husband up in bin bags and transferred him to the garden where she buried him under grass cuttings.
Police later found Jeremy's DNA on bloodstains on the carpet, the court heard.
Prosecutor Nick Corsellis KC said Rickards had subjected her husband to domestic abuse, which became "more severe" in his final days.
