Where will you be going?
How many days, exactly?
Can you find clean water along your route every day or so?
Reason I ask these questions is: if you can find water along your route, you can take along relatively dry, dense fruits (such as dates, banana, figs and dried fruits). If no, you'll want to take along more water-rich fruits such as melon, oranges, peaches, grapes, etc. Just be careful that your food does not "smush" in its bag or container. Methodical organizing of the contents of your pack, with rigid containers for the fragile foods, will help in that regard.
If you are trekking somewhere hot and/or at altitude, you'll need a lot of water - whether from your food or from your water bottle.
If you are going somewhere cold and at sea level, your water needs will be somewhat lower.
How many days can mean the difference between taking along greens with you or not. If you're trekking somewhere warm/at altitude, for more than a week or so, you would benefit greatly from taking along a few pounds of celery with you, some lettuce or cucumbers.
Last year, Dr. Graham delved into this entire topic during one of his Culinary Skills workshops
. I highly recommend attending one year.