We can do most of these. The process is fairly complicated and it's something that only I have access to set up, but once it is setup anyone can propose the details.
One thing, though, is that it is quite difficult for me to change these things after the fact, so let's talk this through just a bit and make this pretty concise.
Parentage type: (Select one) (Is "Parentage Type" the right description for this?)
Seedling of two varieties
A sport of one variety
Hybridizer or Discoverer:
(text field)
Has been used as a parent?
(select yes or no)
Has it had a worthwhile sport?
(select yes or no)
Who hybridized, found, registered, or introduced it?
(text field)
As for the general comments, all plants have a place for general comments at the bottom of the plant's entry.