Ds is nearly 7 mo and given that any baby food I make seems to turn out orange or green, the sick is starting to gross me out and stain everything!! At what age did your dc learn to keep their milk down??
Try lying him flat after he's eaten, for 15 or 20 min - I noticed with my DS4 (now 8 months) that it seemed to be sitting forwards on a full tummy made him throw up - especially if he had snug fitting clothes on. Also, peas seemed to make him sick - not allergic, but I think they need to be well cooked to be easily digestible..... it that's what is making your babyfood green!
My DS is the opposite to oldmum's- lying flat makes him sick (as does leaning forward, too). I hold him up straight ish for five minutes after each feed which seems to be enough now - before he was on solids it was ten or more.