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Three years is the length of time that soil has to be chemical-free for Organic Gardening. For example, the National Organic Program and the Organic Council of Ontario respectively provide guidelines and inspections for organic farming in Canada and in the United States. In both countries, organic growers will not receive or sustain certification if their soil tests positively for the presence of antibiotics, chemical fertilizers, genetically modified organisms, irradiation, sewage sludge or synthetic fungicides, herbicides or pesticides in the three years prior to application.

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Q: How long does soil have to be chemical free for organic gardening?
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Long before there were synthetic pesticides and fertilizers, everyone grew organically. In modern times, organic became a label that is used for food produced without the use of synthetics.


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Organic foods have been grown since the beginning of time, long before chemical fertilizers, herbicides, pesticides, and other chemical pest controls were introduced.


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What is the difference between chemical fertilizers and organic fertilizers?

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