Generally, you can not take fruit on the flight, house plants need to be checked-in. Well, it should not be overweight. Free Baggage Allowance:First class: 40kg (88lbs)
Business class: 30kg (66lbs)
Economy class: 20kg (44lbs)
Acceptance of any bag over 32kg or over 203cm is subject to prior approval and notification upon booking/reservation. Overweight items must be repacked or split into lighter units during check-in otherwise they will not be accepted for carriage.
Anyway, you'd better try to contact with your airline company to affirm this.