Q.Split tomatoes
I suspect that your website is American but can’t find any contact details confirming this – only the odd spelling.
Your answers seem to refer to outdoor grown tomatoes which I assume is the norm in your location but here in the UK, most gardeners have to grow them in green houses which are usually unheated.
My wife does the planting and has, over the years, had some really good crops of tomatoes of various types.
However, she waters them usually every night before bed and I think that this is over watering. I feed them usually once a week with tomato feed and this is what we’ve been doing successfully in the past years.
This year – 2019, the spring and early summer temperatures have been constantly up and down we suspect that this may be the problem especially with the small varieties but can you advise on watering our tomatoes in an unheated greenhouse. watering of tomatoes.

Certified GKH Gardening Expert
They need plenty of water when grown in a greenhouse. These articles should help:
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-in-greenhouse.htm
https://ag.umass.edu/sites/agcenter/files/pdf-doc-ppt/p1828.pdf