Organic gardening?

What are some things I can do to keep my plants from getting diseases, I don’t want to use any chemicals? And how do I keep vegetable intake insects out of my garden? I know there are some insects I can place in to take the others, what can I plant to attract them?

Does anyone know where there is an organic gardening center in NJ?

We are starting a new garden and wish to keep organic as much as possible. We haven’t found much at our local garden center or big retailers for items such as compost or organic seeds or seedlings. We live in Metuchen, but are willing to travel if there is a store that matches our needs. [...]

Do organic gardening products such as pesticides, fertilizers have to be certified?

I’m starting an organic tomato garden and with so many different options, I wanted to make sure that I’m only using products that are in fact organic. I understand that only food and fiber require certification, but what about gardening products?