I garden about 45 min east and north of Saratoga and the high heat and humidity we've been having has caused a lot of blossom drop.

No, I don't think it's due to cold water.

You didn't have to water Friday b'c the rain I got here was the same as you got there that made the opening day at the racetrack a bit of a mess, to say the least. LOL

And I haven't even had a lot of fruit that has set so you're ahead of me in that regard.

Carolyn

Sprinklers are a good way to induce fungal infection. Gently Spank/shake your plants/trusses to help with pollination. We are having hot humid weather as always this time of year which makes pollination difficult but spanking has helped fruit set. This is becoming a ritual every summer for me.

Sprinklers also increase the humidity even more in the vicinity of the bloom and high humidity can gum up the pollen making pollination impossible. Not to mention - like a hard rain they are blossom bashers. ;)

But yes, as Taz said and as the many posts here on it attest, blossom drop is a very common problem this time of year, every year. More so the further south one goes. Here it is 'normal', if one can call it that, given our temps and humidity. And without lots of luck, it will continue for us until early Sept. and then fruit starts setting again.

Dave

Here is a link that might be useful: Blossom Drop FAQ

Thanks for the help. I guess misery loves company. And no, I haven't had to water recently. I hadn't thought to spank my tomatoes, I didn't even spank my kids when they were little. :) I will try it when the foliage dries again. It's raining at the moment.