Imam Ad-Daraqutni related on the authority of Mu’adh (RAA), ‘As for cucumbers, watermelons, pomegranates, and sugar-cane, the Messenger of Allah (ﷺ) has exempted them from Zakah.’ It is transmitted with a weak chain of narrators.

وَلِلدَّارَقُطْنِيِّ, عَنْ مُعَاذٍ: { فَأَمَّا اَلْقِثَّاءُ, وَالْبِطِّيخُ, وَالرُّمَّانُ, وَالْقَصَبُ, فَقَدْ عَفَا عَنْهُ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-} وَإِسْنَادُهُ ضَعِيف ٌ [1]‏ .‏