Best Homemade Fertalisers
Guano is the best
Nettle (Urtica dioica) soaked in water to water the plants with or fine ground&mixed with soil even better if both (keep in mind to use non-flowering Nettle only = for quality reasons;)
Horse dung is ok when composted (leave it in the sun for 14 days so you wont have problems with microorganisms)
Cow manure will have to be from organically bred Cows (much better fragrance;)
Most Herbs ground&mixed with soil work fine (pay attention to specific aroma:)
Fish emulsion works great as it releases nutrients slowly
Use Garlic & grind it, mix with Water & spray on Plants to keep Bugs away you can add Chives to the equation just to spice it up it also improves the aroma