Everything i have learned is at a minimum 4 to 5 hours if we live in the heat, down south, I give mine 5 hours, and not put them threw the heat we have here, I have read a bunch and watched videos and they say at least 4, I give mine 5 hours and then they are in the shade by 4pm.
Mine are loaded, but they did start slow this year, I used a concrete mixer and blended my soil with everything here in the picture, but now that fruit is on, I start adding fertilizer on top, and also in my water I pore in to my Wicking tubs, first year to use these and its looking good, look up Wicking pots for tomatoes for next year, I waters them every 4th day, others in pots like yours every 2 day, and skip watering for one day or two, I have seen that tomatoes like a dry soil before watering, but thats what I have learned..
Like I said, this is the first year for my Wicking pots.
I will get pictures of my pot today.
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