How do I fix the ph of my soil after too much baking soda was added?

Hello Deborah!

Here are some good tips for you! Best to you!

https://www.todayshomeowner.com/how-to-correct-soil-ph-in-your-yard/

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Repeated use of baking soda in the garden can lead to a toxic buildup of sodium in the soil. When this happens, the soil is refereed to as "sodic" or "salt-affected." Chemically speaking, salts are ionic crystalline compounds, and baking soda is one example. Not all salt compounds contain sodium, however, so soils can be salt-affected without being sodic. High levels of salt and/or sodium prevent plant roots from absorbing water, which results in a drought-like response. Germinating seeds and young plants are particularly vulnerable, and many can be killed by high levels of sodium and salt. In mature plants, sodium and salt hinder root growth, stunt flowering and reduce yields from garden vegetables.

Heavy watering washes accumulated sodium deeper into the soil so the plant roots can no longer reach it. To reduce accumulation by half, apply 6 inches of water. However, since high sodium levels reduce drainage, leeching may not be enough to remove a large build up of sodium. These soils should be treated with a calcium source, such as gypsum.

A nursery or local extension organization can evaluate your pH and make recommendations to adjust.

Hi Deborah, this link may assist you, https://www.todayshomeowner.com/how-to-correct-soil-ph-in-your-yard/

Working in some garden lime should help.