Hello, I had the same question come to me last night as I wanted to offer some Rose based aroma for Venusian spirits today (day of writing this reply being a Friday).
Recently I learned that regarding offerings, it’s the astral energy of the offering that the spirits take and not the actual physical essence of the offering in itself.
Since I don’t have any incense but do have a diffuser with a rose essential on hand, I consecrated the diffuser and essential oil with the intention of using it as an offering and also dedicated a small prayer to the Venusian spirits that I was doing so.
I would like to hear from OP and others if they have any experience with the same and their experiences if they would like to share.
Thanks!