I just added data for Tanacetum niveum 'Jackpot' and noticed under Propagation for seeds it shows a question mark instead of the degree symbol. For some reason the system will not let me correct it.

Our system doesn't like the degree symbol. Spell out "degrees" instead.

zuzu, I didn't enter that particular data and it wouldn't let me correct it to the º symbol or the word degrees.

I changed it. Sometimes, when the system runs into an "odd character," it simply leaves everything in that field ("needs specific temperature," in this case) out of the information when you try to edit. I'm not sure why you were unable to edit this entry, but that might be the reason.

I used to be able to edit that area but for a few months now I haven't been able to for some reason ... may be something with my computer.