The Nisab of Henna, Jew's mellow, garlic and onion

Q 3: What is the Nisab (the minimum amount on which Zakah is due) of Henna, Jew's mellow, garlic and onion ?

A 3: There is no due Zakah on vegetables unless the owner sells them and receives money which completes a Nisab which lasts for a full lunar year unchanged, in this case he will have to pay 2.5% as Zakah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.