Compost 'tea'
Some composters are equipped with a system which recuperates compost 'tea'- this is the juice produced by composting which is rich in organic material and can be used to water indoor and outdoor plants.
You can produce your own compost tea by putting decomposed compost in a cloth sack which is then soaked in a bucket of rainwater for at least a week until you have a liquid the colour of tea. Put the compost back in the composter and your tea is ready.
This tea will benefit all your plants during their growth period.