Tomatoes - pinching out
I know this question's often asked... but when do you pinch out the tops of your plants?
My various vine tomato plants are generally 5 - 6 ft tall currently, with on average about four/five trusses with tomatoes on, starting to ripen now. clearly fresh flowers are still coming too but, realistically - even with warm temperatures now forecast in the SE of England for the next few weeks - should I pinch out so the plant concentrates on the fruit already there?
Also, do you pinch out black russians? the fruit on these seems somewhat more randomly spread, not in obvious trusses, plus the stems have divided into two and three some cases so there are potentially several tops to pinch out.