[Community_garden] Soil Amendments

[Susannah Evans]

We have a communal community garden in Columbus, OH - 40' by 80' with a clay based soil. Our group has had several conversations about amending the soil to help break down the clay. Gypsum was suggested and I was wondering if there was a good source of gypsum that would be considered organic? We are not a completely organic operation, but we try to consider everything we add to the soil to make the best decision. Also, we are interested in starting some of our vegetables within the next month. Would gypsum be ok to apply now and till in or should it be applied in the fall. 
 
It was also suggested to add some 10-10-10 fertilizer to boost the soil. We are going to have a soil test done soon to see if we have specific pH or nutrient deficiencies. Any recommendations on some good organic soil amendments that could be added in the spring (or suggestions for fall?). We are looking to grow potatoes, tomatoes, green peppers, zucchini, bush beans, lima beans, peas, lettuce, broccoli and celery.
 
Thanks,
Susannah Evans
Epworth Veggie Garden
Columbus, OH
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