I have added a new page at the top of my blog.
Just add your questions in the comments section at the bottom of the help page and I will then add it to the page at the top. You can also email me photos or post them on your blog and give me the link.
If this page gets really busy I will add a proper forum to the site, but there are plenty of forums on the net and if they are not busy enough then they can be taken down by the forum supplier.
As I have stated I am no expert but I have learnt a few tricks and tips over the years as a commercial tomato grower in Guernsey, UK, Holland, Portugal, and now just for fun in France.
Ask a question on any forum about any subject and you will get many different answers. It is not always simple when trying to find the source of the problem as many factors have to be taken into account. What might be blatantly obvious could have be caused by previous actions and conditions.
Some cheap composts for example have residues of weed-killer that comes from the manure of animals feeding on grass that had a spray drift from weed-killer used in the next field. This has caused a few problems with seed germination and young plants.
Plants turning purple through lack of phosphates could have a poor root system or a lack of other nutrients that stops the uptake of phosphates.
Blackspot (Blossom-end rot (BER) on plants is sometimes caused by a calcium but 99% of the time it is caused by under-watering in the past, so there is no need to add extra calcium as it is in most tomato feeds in small doses.
By watering enough in the future the problem will cure itself.
We can sometimes over analyse problems and most of us are just amateur gardeners, so if we lose the odd plant it is no big deal. The trick is to not take it too seriously and 'enjoy your gardening', as they say on a certain TV gardening programme