Posted: 23/08/2014 at 18:46
Have faith Margaret, feed every other day with a high potash content tomato feed, this is what helps the ripening process, not just the sun. As you may be well aware, at end of Summer nearly every tomato grower has masses of green tomatoes which ripen on trays in a warm room after picking, ie no sun. Also tomato feed is beneficial for flowering plants.
Why not grow a few comfrey plants and make your own organic potash feed, believe me it works. There are good videos on youtube.