I'm excited for you. The seville oranges are very sour, you need a lot of sugar to make them palatable, but well worth it!
We look forwards to the arrival of seville ornages every year. I would gladly be able to grow them! These are the oranges usually used for making marmalade. I usually make a thin shred jelly marmalade since that is what my husband prefers, but not too sweet. They were early arriving this year - we got the first oranges in the shop before Xmas, which has not happened before.
Oranges peeled ready for chopping
Finely chopped peel
My first lot has turned out just a bit soft set, certainly not suitable for the
marmalade awards. I'll hopefully do another two batches at least.