Landscape dyes are produced by Kraftkolour of Australia. Their one-pot dye system contains the dye itself, together with levelling and softening agents, all mixed together. It's all you need to get dyeing your own range of colours.
Each standard 100gm pot will dye 1 kilo to the full colour strength as indicated. The powders can also be mixed to create your own colour range. No preparation or additives are required other than a little household vinegar if you intend to get the most vibrant of colours.