I make marmalade from Lemons, grapefruit and limes from the garden. The Seville orange tree has some baby oranges this year for the first time and the thought of making 'proper' marmalade is quite exciting. My two sons started making marmalade last year with citrus fruit from their gardens. We use equal weights of fruit and sugar which seems to work. I have started using the slow cooker to cook the fruit, lazy but it works a treat.