Hey hun, if it works for you and if you feel like he need them then go for it. My son was prem and we started him on solids around the 5 month mark (acutal age). His paed said that his gut develops the same as a full termer and my DS went from strength to strength. Its a big step, I still remember giving my DS his first spoon of food and his face was priceless lol he loved it. Apples were always a favourite early on. Listen to your mummy instinct, you're doing a great job.