Images rejected - Need advices to understand what i need to change or improve.

Hello,

There are some major issues with your photos, sorry to say.

Composition and exposure are at least two glaring issues.

To help you on your way, read the following links.

User guide:
https://helpx.adobe.com/stock/contributor/user-guide.html
Exposure:
https://www.adobe.com/creativecloud/photography/discover/exposure-in-photography.html
Composition:
https://www.adobe.com/creativecloud/photography/discover/photo-composition.html

I would suggest, you take either photography courses or find a protographers club near by.

The first one is very underexposed; the remainder are poorly composed and not in sharp focus. The Adobe Stock database is already overrun with floral images. Though practicing your photography and editing skills on flowers can be useful and fun, I wouldn't bother uploading any unless you find a very rare species that is underrepresented in the database. Adobe just doesn't need any more.