For Odin, as an offering, you could burn an incent made from tobacco, ash leaves, elm leaves, parsley, woad, cinquefoil, horehound, periwinkle.
For Frigga there are some plants that are considered sacred.
For Bragi you could burn some Wood Avens.
For Idun you could burn apple leaves as an offering.
For Eir you could offer blood or burn some mint.
To Freya you could offer honey or bread.
For the other two I have no idea, sorry :(
Hope I was at least slightly helpful.
Which plants of Frigg would be considered sacred? Could you please specify? The list is very helpful.
By the way, offerings like musk don't offend the gods do they? From what I'm aware of, certain deities are not to be offered musk, animal products like eggs, and so on in other traditions. Just checking.
On April 30th in the Asatru tradition of neo-paganism we venerate Freya, Hel, and Frigga. You can do this by pouring mead onto the ground in Honor of these gods/godesses as well as the ancestors of old to Honor the dead.
For those wishing for intervention, favor or to give thanks to the Gods of the Norse pantheon, here is a suggestion in making choices for offerings and sacrifices:
An offering and a sacrifice can be synonymous. What separates them is in the urgency and intensity of their purpose. Here is a couple of examples. You are making cookies for your family in the kitchen and they turn out really wonderful. You are thankful to Frigg, the goddess of home and hearth, so you put a handful of them on your altar and offer them to her for helping you produce something really nice for your family.
You are a soldier on the battlefield. You take out the very last bullet in your rifle and fix your bayonet. You stuff that bullet into the sand as a sacrifice and pray to Odin, the god of war, that he will stand by you and help you fight bravely.
Those are examples of offerings. One is an offering of thanks and the other a sacrifice. The items themselves were ordinary items except that they were a very personal connection between you and your deity at the time. If you always think about offerings and sacrifices in those ways there should be no doubt in your mind that your choice was appropriate.