The first week or two of July gives a good idea of how successful the season is likely to be.
Just about every plant is loaded with green tomatoes and about four bush varieties, that I started early, have been giving a steady flow of ripe toms for the past two or three weeks.
The main concern now, is blossom end rot on the medium and large varieties.
Looking at the underside of the green tomatoes that are nearly full size, I have noticed that only one tom, out of many, has a touch of BER so I would consider this a great success.
If it takes a minimum of two months to go from flowers to mature fruit, any flower buds that haven't opened by mid July, won't be fruiting in time before the end of the season, in the UK that will be around the end of September - beginning of October when the weather (usually) turns too cold for growing outdoors.
The biggest change I've made this season is that I'm growing all my outdoor plants under cover - shelters or lean-too's etc. around the garden. This means that I don't need to worry too much about tomato blight which destroyed most of my outdoor plants last season!