Tomatoes and Nitrogen

My vegetable garedening book says that by mid-August I should stop feeding my tomatoes with high potassium foods and switch to high nitrogen. I'm happy to follow but I'd like to know why. Unfortunately, no book, no matter what the subject, ever seems to tell you why you should do or not do something but if you know why, it's easier to make judgements, later, in the future.

Can anybody tell me why? I inderstand that nitrogen is good for leaf growth but is this something to do with a second crop and, if so, how it works?

 

I remove some of the leaves as you are growing toms not foliage .
The plants energy can be channeled into producing your edible veg.

 

Thanks all,

I had a thought and remembered where I had seen the article - it wasn't in a book. it was on 'GardenAction', on the web. They say, 'From mid August onwards stop feeding your tomatoes with a potassium rich fertiliser and feed them with a nitrogen rich fertiliser.'

I suppose. thinking about it, I should have asked them the question!

Anyway, thanks for your answers - I shall do just that tomorrow and see what happens, then I'll know!

 

wow!
That is sthg new!!!!!!