Simply seeing a lemon in your dream it means that you will soon regret for one of your actions in the past. This is even more the case if the dream seemed to be very vivid and peculiar. Similarly if you have this dream in the early morning hours of the night then this interpretation is more relevant.
Seeing a lemon that is unripe signifies that you will be under great pressure to make some decision soon. This might lead to incorrect decisions and the chances are that you will need to rethink the whole situation once again.
Slicing a lemon in a dream signifies that soon you will have to share something of significant value with other people. This will not leave you indifferent and some minor conflict is possible over the sharing.
Tasting a lemon in the dream and feeling its sour taste signifies that you will soon be very sad over some happenings in your personal life. If your mood was negative during the dream that this means that you will soon shed tears over some occurrence in your personal life.
Drinking lemon juice in your dream indicates that someone will try to benefit at your expense in your professional life. If this dream is of recurring nature than it means that you will experience very unjust developments in your professional life.
Planting lemons in a dream signifies that you need to be more thoughtful when making decisions that might affect long into the future. You might need to make wiser choices that will have a beneficial effect on your development for long time.
Picking lemons out of lemon trees signifies that you will soon experience great increase of luck in your professional life. More chances will be open for you.