1) Yes, "edible" bananas are not pollenated and are seedless. 2) No, seeded bananas are pollenated and are called "non-edible" because of the many HARD seeds and very little flesh. If seeded bananas are not pollenated, the fruit will not develop.

or do you need a second tree? I cannot seem to find any information related to this specific species about this issue. Also how susceptible are they are fire blight? Any help is appreciated.

From Etwin Aslander - Hi Jeff, Crassula seeds are very fine indeed, making them a little tricky to sow. Shelf life is also quite limited and it is best to sow them within 6 months from harvesting. In my limited experience most Crassula's are not self-fertile but there are exceptions. I have a C.alstonii and a marchandii that are self fertile.

You don't say what variety of muscadine. You should get some grapes the 3rd year and close to a normal crop the 4th year. Some varieties are more productive and some do better in one climate than another. After 4 or 5 years, you should be disappointed with 50 pounds on a muscadine and pleased with 80. I've heard of an Ison (Ison variety) vine producing 200 pounds in Louisiana.