Taste of container-grown tomatoes?

[SharonRossy]

Ok, so here's what I do as per Raybo's recommendation and other research.
For a 20 gallon bag, filled with Pro Mix BX, I add:
3 cups of dolomitic Lime
3 cups of slow released fertilizer with micronutrients - I actually like MG's tomato fertilizer 9-4-12. Although it has added calcium, I add the 3 cups of lime.
2 cups of epsom salts

I don't make a fertilizer strip, I mix the whole thing together, adding gradually as I add the promix. You can add additional perlite, I haven't simply because I don't feel like it.

Then, as the plants start to grow and form blossoms, I give a weekly diluted feed of either MG 18-18-24 or anything I can get my hands on - usually 6 litres or quarts per plant. I do the same for the 15 gallon pots, I really don't make a big adjustment, because in my 20 gallon bags, I might not fill them all the way to the top.
Also, I add epsom salts from time to time when I water with the additional fertilizers.
RT, the 5-1-1 drains very fast so adding the epsom salts would be a good thing.
Lindalana, I water the old fashioned way, manually with a wand shower head and water only the container mix. It takes a long time and it's a pain, but I haven't figured out a drip method yet. That's next year's project.
I would like to add that I have been using containers of all sorts for years and have had many trials and errors - lots of erros. I did the 5-1-1 but it was too much for me and not worth it in my opinion. Pro Mix works beautifully, as long as you prepare it well and keep it amended.
Hope that helps.
Sharon