Citric acid usage for packaged hummus

Well of all your listed ingredients the only two that can really 'spoil' are the fresh basil and fresh mint. Honey never goes bad, and nearly any dried spice can last for a long time with just a degradation in flavor.

I'd say that if you washed and dried (sanitarily) your basil and mint before addition to this mix that you could get at least 1-2 weeks out of it unrefrigerated, and at least 1-2 months out of it refrigerated.

Please note that this is just a ballpark estimate and you may have to do some trial and error to determine a more specific window. That said, I wouldn't be surprised if you could get a significantly longer shelf life out of it than my estimates.

Update - I think the presence of salt does enough to "extend" the life of it.

Another Update - Some Googling has informed that honey is in-fact a preservative. Apparently honey is a rather hostile environment for bacteria due to the production/presence of hydrogen peroxide.

I still think my estimates are accurate, albeit a little conservative now. The best thing you can do is trial and error.

Sources:

http://www.entrepreneur.com/tradejournals/article/132772675.html

http://natural-products.suite101.com/article.cfm/honey_as_a_natural_preservative

From experience I'd say those 6 months don't stack. You could have 6 months in the jar, or 6 months in the freezer - very soon after defrosting the flavour would die out. If you have to freeze I would recommend using it straight from the freezer, if you can avoid it clumping.

The overall potency is degrading from the moment it's picked! But realistically from the moment of grinding, as the oils in the ingredient are slowly seeping and evaporating out of the grain.

Why not make smaller batches more regularly? That's what I do for garam masala, mixing a new batch every 3 months or so.

I would always recommend oven drying spices / peppers very low for a long time - say 2 - 3 hours at 100C (212F). Wet ingredients could be dried in the same way, else added at the time you are going to cook with them.