Java fern

I have a small strand of Java fern attached to bog wood in a 10 gallon tank
with DIY c02 injection.  The fern has minature spore plants on all the leaves.
 Some have more than 10/ea. per leaf.  What is the best way to grow these out?
Do I leave them on the parent or pinch them off and attach them to the wood

Dan Simon
Seattle, WA