1) grushuvka ...was good in containers ...fine taste... BUT mid-season (Not early).
2) Siberia (rugose leaf dwarf ) was good in containers even 3 gallon .
as reported ...did set fruit in LOw temps and earlier than others that would not do amazing things in low temps.
3) There is also a "Siberian" (regular leaf) that is a favourite dependable of many.
4) Siberia and Siberian should also not be confused with "Early Siberian" (
Sibirskiy Skorospelyi ) Which also could be interesting to you.