Once you get a taste for dyeing with plants, you start to question the potential of everything around you: plants in your garden and surrounding landscape, your fridge, your food cupboard and even your medicine cabinet if you’re into herbs! I recently bought a bunch of purple basil to infuse in oil and serve with baked vegetables; rather than leaving the remaining half-bunch to turn to sludge in the fridge, I simmered it in water for 45min, strained the leaves out and added some yarn pre-mordanted in alum and cream of tartar to see if any of the dark red of the dyebath would bond to it.
Interestingly, the wool/ silk took up a lot of colour, while the wool just a touch, whereas sometimes the opposite happens. I’m starting to think there must be affinities between certain plant pigments and certain fibres… or perhaps the capacity for bonding is pH-related. It’s an enigmatic art.