My very scientific seed raising mix experiment

All these pots contain tomato seedlings - except for a few zucchini's at the back. The square icecream containers have Rouge de Marmande tomato seeds/seedlings in them but with different types of seed raising mixes. They were all sown at the same time and place in the same conditions (ie. the mini greenhouse). The brown container 2nd from the left is doing the best - it contains 4 parts sifted compost and 1 part sand. The blue container next to it contains what i call the "Expert mix", which is 3 parts peat, 2 parts san and 1 part sifted compost. The AJ mix is in the orangy yellow colour container and it has 1 part worm castings and 1 part sand, and unfortunately (and suprisingly) has only one tomato seedling plus a rogue pumkin sprouted from the worm castings.