There is so much myth surrounding the word organic today. One can't help thinking if it's organic, it must be expensive and a luxury really. But the truth is, organic simply means free of pesticides and other toxic chemicals; so all organic gardening really means, is making use of traditional methods of pest and herb control as well as fertilisation, which is often much cheaper than store bought chemical alternatives!
Household kitchen waste such as peels and egg shells are great for making organic manure. Many avid gardening lovers do home composting as it is one of the best methods of making your soil naturally rich in nitrogen and other nutrients. After all, we live in a round and not flat world, and what comes from the soil will only do it good, when it goes back to it!
A good way to make sure you use organic fertiliser instead of artificial enhancers that can upset the ecological balance of the soil is to network with other organic gardeners in your area and exchange resources. If there's a Man with a van Brighton who goes around distributing natural manure from his farm, that's well and good, but if there isn't, a network of neighbours and nearby gardeners can come in handy!
A garden is nothing but an ecosystem, where all the elements in the garden including the plants, shrubs, grass and flowers work in conjunction with insects, microbes, birds, inorganic elements like minerals and water to create a system that works in harmony. Toxic chemicals that harm one type of pest are likely to be harmful to some other aspect of the system as well, so they should be avoided.
Instead, it is wiser to find out about the right plant combinations, natural herbicides and pesticides and using organic waste material to create nutritious compost for the soil. Abnormally vicious pests and weeds are a sign of a system gone out of balance, so finding out the root cause of the problem is more important for the long term health of your garden than using a quick chemical fix to suppress it.