Sorry, you will have to be more specific as to which newsletter you would like to receive. We have dozens of newsletters that are distributed through the OSU Extension system.

Any newsletter about home vegetable and/ or  flower gardening 

You can access our monthly (Feb-Dec) Horticulture Tips articles at this website - https://agriculture.okstate.edu/departments-programs/hla/research-extension/horticulture-tips/. If you click on Monthly Topics you will see the articles for each of those months. I just noticed that earlier newsletters and the last two months are not currently posted but we are working on resolving that issue.

You might also reach out to the Oklahoma County OSU Extension Center to see what newsletters/resources they have to offer. 

https://extension.okstate.edu/county/oklahoma/