Simple and Direct:
* The garden is flourishing with vibrant flowers.
* Her business is flourishing thanks to her hard work.
* The economy is finally flourishing after a period of recession.
More Descriptive:
* The once-barren land is now flourishing with life.
* The city is flourishing with a vibrant arts scene and diverse population.
* His career is flourishing, full of opportunities and successes.
Figurative Language:
* Her spirit is flourishing, unburdened by doubt and fear.
* Despite the challenges, their relationship is flourishing with love and understanding.
* The city's cultural scene is flourishing, bursting with creativity and innovation.
The best sentence for you will depend on the specific context you're using it in.