To make a nitrogen boosting fertilizer
To a two cup container add
Contents of 1 teabag
1 cup of oats
1 cup of boiling water
let sit for at least an hour, preferably longer.
Strain to remove particles.
Water your plants once every three weeks with the liquid.

For potassium, phosphorus, calcium and magnesium
Take a banana skin, chop finely and add to a litre of water.
Let soak for at least an hour to release nutrients.
Strain and water the plants with the liquid.

For a complete home made fertilizer, into a 4l container add
3 egg shells crushed as finely as possible
3 banana peels chopped
peel from one potato
Tea leaves from 3 tea bags
3 table spoons of 3% hydrogen peroxide
1 teaspoon of baking soda
Fill with warm water
Let sit for 24 hours
Strain out the solids
Use the liquid to fertilize your plants.

To kill gnats and their eggs in the soil:
1/3 of a cup of 3% hydrogen peroxide
1 cup of water
Water the plants with the liquid.