I have been sniffing through my spices and I noticed a few of them dont smell as strong as they use to so I got rid of them. I like to use fresh herbs also, but I have a lot of recipes that call for dried herbs.

I keep mine about 5 months. But i do not use them most.
I replace them after 5 months.

shannone, you can dry your own herbs, especially if you have your own herb garden... My grandma used to do it. She would pick the leaves, not many, and it depended on the size of the leaf and plant. Then she would lay them on a paper towel on a specific counter. She'd leave them there for a day or two, and occasionally turn them over so they dried evenly. I think you could use a dehydrater if you have one, but I don't know many people who have one anymore.

Also, any recipe that calls for dried herbs can be modified to use fresh herbs. I can't remember the exact substitution rule though, I'm sure someone on here has it. I usually add seasonings by taste, I'm bad about tasting the food to see if it's 'missing' something, then I'll dig through the cabinets/fridge to find the perfect thing to fix it.

Usually if I run out of fresh parsley (this is just an example) and I needed
1 tablespoon of fresh parsley - I substitute 1 teaspoon of dried.

Dried herbs are more potent so I usually use 1/3 of the measurement for dried when I am substituting dried for fresh.

We don't throw spices out here, we just use them till they're gone. Unless we were trying to make a gourmet meal or something, we wouldn't care if something had lost a little hint of flavor :p