In a tightly sealed jar about 2 years is the maximum.
That is about 3 gm.
It takes about 4 weeks. After harvesting rosemary stems, hang in a group of 8, and hang in a dry, dark place. Then store in a air tight jar.
1 tablespoon fresh rosemary equals 1 teaspoon dried
To substitute fresh rosemary for dried in a recipe, use three times the amount of fresh rosemary as the recipe calls for dried. For example, if the recipe calls for 1 teaspoon of dried rosemary, use 3 teaspoons of fresh rosemary. Remember to finely chop the fresh rosemary before adding it to the recipe for best results.
When substituting dried rosemary for fresh rosemary, use about one-third of the amount called for in the recipe. Dried herbs are more concentrated in flavor than fresh herbs, so typically, 1 teaspoon of dried rosemary is equivalent to about 1 tablespoon of fresh rosemary. Adjust according to personal taste, as flavor intensity can vary.
One small sprig of rosemary converts to 1/2 a teaspoon of dried rosemary.
The herb is generally pulled off the stem when cooking with rosemary. Because the rosemary pieces are relatively long, they are usually chopped into smaller pieces before use. With dried rosemary, like what can be bought in the grocery store, the herb is already off the stem, and may be crushed in the hand before being added to the pot.
4 tsp of dried rosemary equals 1/4 cup fresh.
For rosemary, the ratio is three to one, fresh chopped to dried. So if your recipe calls for 2 tsp. of dried rosemary and you would rather use fresh, you will need three times as much, or two tablespoons of fresh chopped rosemary leaves.
If your recipe calls for fresh minced rosemary but you only have dried rosemary leaves, you can substitute the dried version. Use about one-third of the amount specified for fresh rosemary, as dried herbs are more concentrated in flavor. Simply crush the dried leaves slightly to release their oils before adding them to your dish. Keep in mind that the flavor may not be as vibrant, but it will still enhance your recipe.
Rosemary is an aromatic herb, most often used in cooking. You can find dried rosemary in the spice section of your grocery store. Grocery stores also carry fresh rosemary sprigs, if that's what your recipe calls for. Rosemary is also grown outdoors as an ornamental plant, often as part of an herb garden.
You can dry fresh rosemary by hanging the stems upside down in a cool, dark, and well-ventilated area for about two to four weeks until the leaves are brittle. Alternatively, you can use a dehydrator or an oven set to a low temperature. Once dried, store the rosemary in an airtight container in a cool, dark place to preserve its flavor and aroma. This method allows you to keep dried rosemary for several months.