If using Coco A & B with no additives then please follow the usage guidelines illustrated on the bottle as shown below:
2ml A + 2ml B mixed in 1 litre of water for young plants.
4ml A + 4ml B mixed in 1 litre of water for established plants.
Always add water to A mix before adding B mix and never mix directly together ensuring both bottles are shaken well before use.
Feed charts are available from the Buddhas Tree website.