What Neptune governs
Neptune covers imagination, film and music, faith, intoxication, deception and self-deception. The single thread is the removal of edges. Where it sits, definition is hard to maintain, which produces both the artistic reading and the confusion one.
It is the placement most often described in flattering terms and it deserves the plainer version. Neptune contacts make it difficult to say exactly what is happening, and that difficulty is neutral. It permits imagination and it permits being misled, frequently at the same time.
Fourteen years, which is an era not a person
Fourteen years in a sign means the Neptune sign belongs to an era. Everyone born across most of a decade and a half holds the same one, and it describes what an age group was collectively vague about, idealised, or unable to see clearly.
Compared with Uranus, which turns over a sign in about half the time, Neptune's cohorts are wide enough that the sign is better treated as a historical label than as chart information. It is genuinely useful for reading a period. It is not useful for reading an individual.
Where the personal reading actually comes from
With the sign shared so widely, a natal Neptune becomes personal in one of two ways. Either it sits close to an angle or a personal planet, in which case the aspect does the work, or the house localises it.
The house names the department of life where things are hard to see straight. Neptune in the second house does that to money and worth; in the sixth to health and the working day; in the tenth to reputation, where a person is seen as something other than they are. All three need a birth time, and Neptune is the placement where a guessed time is most likely to produce a confidently wrong reading.
Rulership and dignity
Modern practice gives Neptune the rulership of Pisces, which traditionally belongs to Jupiter. Reading both is common and productive: Jupiter shows what a Piscean placement believes, Neptune shows where its outline goes.
There is no classical dignity scheme. Suggested exaltations vary between authors and none of them is settled, so any table listing a Neptune exaltation is reporting one practitioner's convention rather than an inherited rule.
Retrograde, which is unremarkable
Neptune is retrograde for roughly five months of every year, which puts it in something close to two out of five charts. A frequency that high cannot mark out an individual, and a natal Neptune retrograde is best treated as background rather than as a feature to interpret.
Where the retrograde does matter is in transit, since the slow reversal keeps Neptune within orb of the same natal degree for years at a stretch. That is why Neptune transits are described as periods rather than events.
Questions people ask about this
How long does Neptune stay in one sign?
About fourteen years, following an orbit of roughly a hundred and sixty-five years.
Is a Neptune sign worth reading?
As a description of an era, yes. As a description of a person, no. The house and the aspects carry that.
Does Neptune rule Pisces?
In modern practice yes. Traditionally Pisces belongs to Jupiter, and many astrologers use both.
What does a natal Neptune retrograde mean?
Very little on its own. Neptune is retrograde about five months a year, so a large share of charts have it.