Neptune in the Signs and Houses
The short answer
Pick the sign Neptune was in when you were born for every date it was there from 2000 to 2035, or the house it falls in for your rising sign.
Neptune has twelve sign pages and twelve house pages. Spends about fourteen years in a sign. It describes where you idealise, imagine and lose track of the edges.
Neptune in each sign
Every date Neptune was in the sign from 2000 to 2035, read from the ephemeris, so you can check a birth date against it.
Neptune in each house
Which sign puts Neptune in that house for your rising sign, with whole-sign houses.
Every planet · Cast your free birth chart to see where Neptune sits in yours.