dyeing and printing fabric with 'eco dyes' from a beginner

I recently read India Flint's book Eco Colour and wanted to try something before the great freeze. This is my first large trial - an old cotton dish towel rolled around a copper pipe and a steel engine part (?) I also soaked some leaves in water first since they were a bit dry. There are a few smooshed rose hips and a few thin pieces of steel And a small piece of bark with fungi/lichen on it . Rolled it up tight and tied some wool yarn around the bundle and simmered it in vinegar water. Then left it outside to freeze for a week.

I'm looking forward to spring now --- it's addicting I suspect! Doesn't it look like a spine & hip xray?