If the addition is made when the contractual agreement is entered into, sure the landlord can exclude activity which is legal. Many landlords do not allow water beds, structures or play items that would increase their liability insurance, smoking, etc. There are sound reasons for an owner not wanting pot to be grown -- increased electrical and water bills, likelihood of others breaking in to steal the plants, personal dislike of drugs, etc.
If the addition is made when the contractual agreement is entered into, sure the landlord can exclude activity which is legal. Many landlords do not allow water beds, structures or play items that would increase their liability insurance, smoking, etc. There are sound reasons for an owner not wanting pot to be grown -- increased electrical and water bills, likelihood of others breaking in to steal the plants, personal dislike of drugs, etc.
