We now know that there are many, cheap ways to care for our plants. Fertilizer Tea can be made by soaking manure (horse/cow) in a bucket of water (use an old orange bag) for 2 weeks. To use it, we need to dilute it first (quarter bucket of tea, three-quarters water) and then water our plants with it. The same method can be used with compost, seaweed and comfrey leaves ... even weeds!
Pesticides are fun to make! Try making this garlic spray: lots of garlic (about 10 cloves, slightly crushed), a quarter cup of grated sunlight (or other pure) soap and steep in 1 liter of boiling water. When cool, spray on the leaves to keep insects away. You can also add some chillies and / or onions to this mixture.
Egg shells make a rough ride for greedy snails and are sure to discourage them from getting near your plants if you crush them and spread them around the base of the plant.