Rosemary can be used for protection and smudging instead sage ,since it is more available and most people have it in them own garden .I use it as offering for my spirit guides and totems .
Rosemary
Planet - Sun
Deities - Zeus, God of fatrherhood and protection, Hera, Goddess of purification and marriage
Magical uses - Banishes negativity and nightmares. Cleansing and purifying, Protection, Memory spells. Burnt to cleanse an area before casting a circle
Non-Magical uses - A rosemary and oil rub is said to slow down hair loss by boosting the circulation. It contains alot of iron and vitamin c so it is great for tea.
Here some cultural information .In case that you would you like to grow rosemary in pot or in your gatden best way to start it is to purchase already grown plant or to snap branch of already well stabileshed one .Do not try to start it from seeds ,they have low germinating rate and take ages to have adult plant even then .In case that you decide to use the snap method once you obtained the branch put it in half glass of water and then place it in kitchen or bathrom windowsill and it will grow roots .Keep in mind rosemary can become very huge bush which is pretty hardy once it has deep roots so you do not want to plant it next to your thyme or parsley since it will outgrow them for year or two .All what it needs is light (preferrably bright sunlight ) and water and it grows as weed .Once it has grown big you can make your own rosemary bundles and use them for smudging .It can be used for seasoning (goes well with potatoes and fish ) and can be used as tea .So in short one herb many uses .
Rosemary is an Acetylcholinesterase inhibitors,
meaning that your attention stays focused,
which can explain some of it's magical effects.
for instance perhaps even the smell might be effective,
thereby people would have a lasting impression of you,
same thing for studying, if you consume it,
then you'll be able to focus on your studying more.
though make sure to take some while studying,
so that it maintains the focus you have.
Note that you must take breaks from the herb,
to allow your focus to move to other things.
also the actual attention hormone acetcholine,
requires choline and pantheotic acid,
in order to successfully be created.
while some is available in vegetables,
i recommend getting a supplement,
for any serious concentrators.
Rosemary has also been used forany centuries in medicines and antifungals the Egyptians once thought it very valuable for getting rid if dark creatures and demons hope this helped :)