Quality Issues

Most of the garden paraphernalia (carved wall motifs, custom pots, etc...) can't be used commercially unless you have signed release forms from the designers who created the stuff. 

Keep in mind that Stock is a global assets business; not a social sharing site. The acceptance standards here are much higher for use by professionals.

Whatever you submit must have a clear intent, excellent visual & technical quality, and be legally free to use commercially. Read your Contributor User Guide for more tips.

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
• https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustrations.ug.html
• https://helpx.adobe.com/stock/contributor/help/how-to-submit-distinct-content.html
• Model/Property Releases:
  https://helpx.adobe.com/stock/contributor/help/model-release.html
  https://helpx.adobe.com/stock/contributor/help/property-release.html
  
  

It also helps to compare your work with current Stock inventory to see what's been accepted.

https://stock.adobe.com/search?k=garden  51.8 MILLION results

Hope that helps. 

There is a lot of noise in the shadow areas.
Signs or other images with letters or logos will not pass the screening.

The highlights are blown out.

Hello,

I think you could work on your composition. This is part of Adobe's quality standards. In your photos, you have no clear subject. I would say they are rather cluttered.

What is your subject? 

Read this link to give you some idea about composition.

Composition:
https://www.adobe.com/creativecloud/photography/discover/photo-composition.html

Slanted verticals on this one.