Our Green Zebra grew the fastest... and looked like it would be our first tomato of the summer but we had a dilemma -- how do you tell when a green tomato is ripe?! It slowly turned a vaguely yellowish green so I kept squeezing it until it felt soft enough that I guessed it was ripe...
Once it was soft we decided to take a chance and cut it open. It was delicious. It had a strong tomato flavor with hints of lime. Wonderful. It has also been hardy and prolific... so I think we will definitely grow it again next year.