Agree with @jcguarneri. I grow JT-02 and Kasandra. Both must be harvested by cutting the stems, as with Asians. Kasandra will sometimes drop by separating at the calyx if over-ripe. I’ve had 3 crops of Kasandra, and here in Z7A they are 80-100% ripe by late Oct / early Nov. I’ve had 1 crop of JT-02 and picked it ~75% ripe in early Nov. I finished both indoors. I don’t think either one will ripen fully for you in Z5B but Kasandra is your better choice.
As Jay suggests, look at Sofie’s Gift when it is available. It is reportedly early: