What to eat to help hair grow longer?

Im looking for food sources that have a lot of b12 in it. im trying to find food sorces tha are VERY healthy for your hair. well, healthy for all of me, but Im wanting longer hair. Ive already been putting 1 tbs honey, and 1 egg yolk on my hair once a week. Ive researched foods that have the most b12, but there saying that the highest b12 foods are sea food. I love sea food, but I dont exactly eat it a lot. Are there any fruits or vegetables that are high in b12?