Is there no reward for charitable giving of vegetables, and has anything concerning this been reported from the Messenger of Allah, may Allah bless him and grant him peace?

If the intended charity is voluntary alms (sadaqat al-tatawwu'), then the statement that it is not accepted is incorrect and void. The widely transmitted texts of Islamic law indicate the acceptance of charity if it is given for the sake of Allah, even if it is little, such as half a date or a morsel placed in the wife's mouth. This is in accordance with the Prophet's (peace and blessings be upon him) saying: "Protect yourselves from the Hellfire, even by giving half a date in charity," and his saying to Sa'd ibn Abi Waqqas: "Indeed, whatever you spend of expenditure, it is charity, even the morsel you raise to your wife's mouth," and Allah's Almighty saying: "So whoever does an atom's weight of good will see it, And whoever does an atom's weight of evil will see it."

However, if the intention is that zakat (definition) is not obligatory on vegetables, then this is correct according to the majority of scholars. Nevertheless, the price of what is sold from them is included in the total amount of money a person possesses, and zakat becomes obligatory on it if a year passes and it reaches the nisab (definition) by itself, or by combining it with other money or trade goods.