Cherry jam that will not set

[Rawson Margaret]

I made cheery jam just over 1 week go, bottled it and thought all was well. It now will not set. Can I re-heat it and add pectin then re-bottle the jam?
Any advice or help would be great.

Thanks

Margaret

 

[justplainbill]

Yes; but some people like their jam (as opposed to jelly) to be a little runny. Did you add enough sugar and cook it down a bit before jarring the cherry mixture?