So a few things - some varieties are just prone to BER (roma types especially - a genetic trait). Some always BER the first few fruit then the rest are fine.
But in containers, it is hard, without drip irrigation, to keep even watering on a plant. So the plants set fruit, then it gets hot, and the plants don't get the water they need and start to wilt a bit - the plant goes into preservation mode (damn the fruit...I am saving myself!).
I think the best you can do - water often when it is really hot, try to not let the plants visibly wilt, and add a tbsp or two of pelletized lime in a circle around the base of the plant and scratch it in.....do this every 3 weeks or so, since in containers, nutrients can wash out more easily with so much needed watering.
Of my 200 or so tomato plants in pots, the occurrence of BER is here and there - definitely some element of variety susceptibility, but even more due to the nasty 100 plus degree days we seem to be endlessly having here.
Edit history
Recommendations
0 members have recommended this reply (displayed in chronological order):
= new reply since forum marked as read