Hi, There is something very strange that I can find no information. I have a new block with quite poor soil on a slope. Dug a net&pan for my lime tree and a few wild tomatoes sprang up. And they grew huge from the fresh compost I suppose. Weird thing is they just turned from green to yellow and stayed that way. I picked them but most of them eventually went bad but after months. I thought it might be a freak yellow variety, but what explains that they don't ripen, but last firm & unripened for months. I still have 2 left from the batch I picked back in October! And they are still firm. I did fry up a few, in case it was a wierd variety, and they were edible but no flavour. too wierd. maybe someone has seen something similar.