I would think these would fall under standard I.B since they are gifts not additional compensation.
I think of additional compensation as an agreement BEFORE performance, and gifts as non contractual. Since there was no contract stating that the manager would receive flowers or food if a good job was done, then these are gifts.
Under standard I.B the manager would not be able to accept any gifts that could reasonably be expected to influence their objectivity. Modest gifts are ok, and I would consider both of these as modest. I would expect both of these to be ok to accept without the need for disclosure.