When to start food?

Hey fellow moms, when did you start to introduce baby food and cereal to your children? My son is 4 months old, is that to soon? Also how often do you give them the baby food/cereal? is it at every feeding?

    I started my son around 2 months. But he was so big and nursed almost non stop. Also he had food envy bad. Everytime I ate anything in front of him and he would watch me put it in my mouth then cry for it. Lol I started the first week giving it to him around mid day so in case it gave him any tummy trouble it wouldn't be in the middle of the night. Then when we knew he was ok with it I would give him cereal right before bedtime too.
    About Stacey
    Current: Henrico, Virginia
    Birth: September 17
    On Moms.com since: Apr 2, 2014
    Hi, my name is Stacey and I became a first time Mommy in November 2013 to a beautiful baby boy named Drayken. He was a surprise to his Daddy and i, but he is the best thing that has happened to our lives and has made our lives so much fuller of love.