what soil do onions grow best in
Raised beds are ideal for growing onions and garlic since they provide good drainage and can easily be amended by tilling 2â-3â of compost into the soil. Onions and garlic grow best when the soil pH ranges from 6.0 to 6.5. If you have acidic soil, you will need to add lime. To find out your soil pH, and if lime and nutrients need to be added, submit soil samples to the NC Department of Agriculture for free analysis. Soil test boxes, forms and instructions are available from any Cooperative Extension office.