Last fall I planted trays of fruit seeds. Amelanchier (Timm, Success
offspring or similar), pear (bartletts & OP crosses), black cherry, clove
currant, and several apples. The area I stored them didn't get more than a
week of freezing, and went above 40 F only once thru winter. When I
inspected them, the clove current was mostly an inch tall, and some of the
apples were starting.
I recall reading somewhere that Ribes are difficult to germinate. Maybe a
cooler temperature is called for.