On 28/08/2014 15:25, Bob Hobden wrote:
"Bill P" wrote

I have three breeds of tomato ripening in the greenhouse. Gardeners
Delight, New Girl and Ferline F1.
Problem is that as the tomato's ripen there are yellow patches at the
top.
I have never experienced this before.


Sounds like Tomato Greenback. They believe it's caused by low levels of
potassium and phosphate and/or hot sunlight that damages the stalk end.
So a good tomato feed and shading in hot sunlight and don't remove too
many of the leaves which do provide shading to the fruit and keep the
house ventilated to reduce heat buildup.

Hi Bob, you mentioned shading and I don't know what I was thinking but I
have not used any shading this year. I usually use coolglass.
I have not had been able to spend very much time in the garden this
year, not as fit as I once was.When I have been out there its been a
struggle.
Thanks for your input Bob.

--
Bill P.
Shildon
Cradle of the Railways
South/West Durham Land of the Prince Bishops.