Reply To: Blossom End Rot

August 17, 2020 at 12:52 pm #640

Hi There…. I have had problems with San Marzano all year with blossom end root. There are many issues that cause blossom end rot they are as follows:

High and low temperature changes
High and low humidity changes
Under and over watering

These are just a few ….. in an ideal world if the temperature was constantly at 25oc and the humidity 70-75% all the time I would suspect all would be OK.