Compost Tea (one of my favorites, as i use ground up male plants, or the sticks/stems/fan leaves of the harvested females for this)
Origin: The easiest to come across commercially, or to make at home. this is used worldwide with a variety of ingredients.
Provides: A big boost of microorganisms, helps feed the plants, and boosts a plant's immune system. NPK ratios vary depending the type of compost made.
Preparation: Place a bunch of dead plants in a nylon stocking or screen, put that inside a bucket with about 15L of water, adding water as it evaporates (which means leave it uncovered). after 2 weeks, dump the inside of the bag/screen/stocking back with the rest of your compost pile outside or throw it away or whatever.
Application: If you want to foliar feed this, filter it well, then 1:8 ratio of tea to water. otherwise, just add it in when watering, at a 1:5 ratio. use it every 2 weeks.
Origin: the business end of various animals.
Provides: This really depends on what the animal ate, and what the animal is. Rough estimates are:Cows: .6%N-.3%P-.3%K
Preparation: 1 part crap to 10 parts water, in a bucket. 2 weeks, stirring periodically. (again, this is better for the nylon stockings, otherwise your gonna have to filter it - yuck)
Application: 1 part poop water to 1 part water. can be used every 2 weeks.
Fruit tea, with or without Molasses.
Origin: made with fermenting fruits. its recommended to add molasses for flowering.
Provides: Rich in NPK, but also contains calcium and some other trace elements. Very rich in microbial activity. Using molasses adds a large amounts of carbs and can contribute to fungus (in high heat grows)
Preparation: Cut fruits into small pieces. place in a container and cover them with molasses( OR cut up fruits, place into a ziploc bag with NO molasses or air) Let it sit for 2 weeks, opening it periodically to let out gases. filter.
Application: 1 tablespoon of fruit rot juice (ew) to 1 liter of water. use it every 10 days.