Latest national guidelines (FSAI, 2012) recommend the introduction of solid foods at about 6 months of age (24 weeks) but not before 17 weeks and not to be delayed beyond 6 months.
Look out for signs that indicate your baby is ready to accept solids such as waking up at night when before they slept through the night, sucking on their fists, and watching and taking an interest in what you and other family member are eating.