Some recipes advise picking after the first frost, which concentrates the sugars in the hips. The hips will also have softened and picking them turns into very sticky activity and anyway, I can't be organising my diary around a frost! So I opt for the artificial chill and simply pop the hips in the freezer overnight, having washed them first.
Not restricted to gravy however.... try diluted with sparkling water, or hot water for a healthy tea or drizzled over ice cream or pancakes!
Strain through a jelly bag. Set the juice aside and repeat the process with the rosehip pulp.
Combine your two lots of juice and boil fast to reduce by half.
Measure the juice and add 350 grams of sugar for every 600 ml of juice.
Boil hard for about 5 mins then pour into small sterilised bottles.
Either freeze or store in a cool dark place.
Refrigerate and use within two weeks once opened.