For Large Altars:

Artemis offerings

For large altars:

Bows

Arrows

Moon shaped food (cookies, cakes, etc.)

Animal shaped food

Honey

Round honey cakes

Fruits

Wine

Cooked natural meat/fish

Incense such as jasmine or lemon

White, green, and red candles

Animal bones*

Tusks*

Animal hides*

Deer antlers*

Moon shaped objects

Moon water

Pictures of wild animals

Images or statues of Artemis

Clothing (either your favorite garment or clothes bought specifically for Her)

For small/hidden altars:

Almonds

Walnuts

Mugwort

Wormwood

Tarragon

Cedar leaves or bark

Oak leaves or bark

Willow leaves or bark

Fir leaves or bark

Moonstone

Amethyst

Quartz

Owl or quail feathers*

Animal claws/nails/teeth*

Wildflowers

Amaranth

Pearls

Silver

Art or figurines of wild animals

Art or figurines of bows and arrows

Your own hair (collect by getting a haircut or collect some from your hairbrush)

Arrowheads

Actions:

Dancing

Herbalism

Donating to wildlife programs in Her name

Donating to women's programs/shelters in Her name

Donating girl's and women's clothing

Cleaning up nature trails or parks

Taking nature walks and enjoying the wildlife

Giving Her offerings at midnight

Including Her brother, Apollo, in your work and offerings

Making arrows

Practicing with a bow and arrow

If you hunt, invoke Her at the start of your hunt and give thanks to Her when you finish your hunt. Never take the creature you hunted for granted and try to use the whole animal or donate what you dont use

Having a feast in Her name that includes all her favorite food and drink

*Artemis will not accept nor like these items if they are gotten in unethical ways. Please, either buy them from a reliable source or find them yourself in nature.

Sources:

https://sacredwicca.com/goddess-artemis

https://otherworldlyoracle.com/goddess-of-the-hunt/

And the rest are what I offer Her!