#1 As for what the flag leaf looks like read this post:
Finally!
www.bananas.org/showthread.php?t=438
#2 Pupping does have some minimal effect on the growth rate of the
mother. Only a select few should be left to grow for the next season.
#3 Even here in So Cal we get temps in the low 40's. My cold sensitive
reds survived with very little damage to the leaves. Just some browning and shredding from the winds.
#4 The leaf edges turning brown is normal and leaving them on the plant
is what's best for the plant unless your just growing for foliage then
you can prune as you see fit.
#5 I only use organic methods to feed so?
#6 Yes and yes. The best bet is to read this post.
Best bananas for me?