The right time for marriage depends on culture, society, religion, demography, maturity level and life experience of the individual. In Vedic astrology marriage prediction is very complex and astrology can predict probable time of marriage.
First house, second house & 7th house are important and primary houses of marriage in Vedic astrology. 4th house, 5th house, 8th house & 12th house also influence timing of marriage; hence important for marriage prediction..
In a vedic horoscope; first House or Ascendant represents self, 7th house is Kalatra Bhava representing life partner, 2nd house represents immediate family and longevity of the spouse, 4th house represents happiness and home, 5th house represents Purva punya, 8th house represents longevity of the native & 12th house represents bed pleasure. These elements are very important in marriage astrology preiction.
If ascendant & ascendant lord are well placed and well connected with primary/ secondary houses of marriage or lords of primary or secondary houses of marriage then it promotes marriage. Badly placed ascendant & ascendant lord establishing no connection with primary or secondary houses of marriage delays marriage. Similarly if 7th house or 7th lord are well disposed and well connected with primary and secondary houses of marriage or lord of primary & secondary houses of marriage then it promotes marriage. Badly placed 7th house & 7th lord establishing no connection with primary or secondary houses of marriage delays marriage.
In vedic astrology prediciton; Venus is the karaka of marriage for males and Jupiter is the karaka of marriage for females. When the karaka is well placed and well connected then it promotes marriage. When the Karaks are afflicted then it delays marriage. By assessing all the relevant houses, their lords and the Karaks the broad timing of marriage can be assessed.
Role of Dasa – The timing of marriage can be narrowed down by Dasa and transit of planets. Dasa of the lords of the primary and secondary houses of marriage, Karaks of marriage & Rahu promote marriage. Transiting Saturn and Jupiter should aspect the relevant houses & the karakas at the time of marriage.