Cabbage, in both P2P and F2P, is relatively useless, due to the fact that it only heals 10 LP. One Cabbage in particular, which boosts some Melee stats, is the Cabbage you can pick in Draynor Manor.This item is notable since jagex makes jokes ofthen featuring cabbages or involving cabbages such as in cristmas 2011 where the player would be given cabbages if he/she revealed the identity of "santa".
These are some locations where you can find the cabbage in F2P.
North of lumbridge
South of falador
Draynor manor- Special cabbage