Baking soda neutralizes the ph in the soil and nothing will grow there. use baking soda around all of the edges of flower beds to keep the grass and weeds from growing into beds. Just sprinkle it onto the soil so that it covers it lightly. Do this twice a
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If it can keep stray cats away I will buy all the vinegar. Vinegar has myriads of uses in the kitchen but it can also do miracles in the garden! Look at these 12 amazing vinegar uses in garden to know more.
Weed killer: 1 gallon vinegar, 2 cups epsom salt, cup dish soap not sure how this is organic unless she uses organic vinegar, organic Epsom salt & organic dishsoap- which I don't think is possible but more or less chemical free.
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weed prevention for two years: newspaper will prevent any grass/weed seeds from germinating, but unlike fabric, it will decompose after ~ 18 months. By that time, any grass/weed seeds that were present in the soil on planting will be dead.