Human urine, good source of Nitrogen. Doesn't cost much.
Wood ash, good source of Potassium. Dusty as hell, got to be careful not to breathe it. Found one of my birds taking a dust bath in it.
High Phosphorus Bat Guano. Easier to mix with water than Bone Meal, great for Tea.
Steer Manure, $1.49 per cubic foot. Plenty of Nitrogen in their.
Don't feel quite as positive about Bone Meal. But it works very good. I prefer to mix that into the soil, not use it in the Tea.
Worm castings, Worm castings, Worm castings. And more Worm castings. In my case, they get fed banana peels and coffee grounds, maybe a pound a day - every day.
CARBON DIOXIDE. A great way to compensate plants for inadequate ventilation. Even better when the plants do have adequate ventilation.
I get my CO2 from a sugar water yeast mix.
The Nice Part about Running a Temperature ~
A 30 Degree day feels like a 40 Degree Day