The phrase "a fertile growing ground" is correct and usable in written English.
It can be used to describe an environment that is conducive to growth, whether literal (like agriculture) or metaphorical (like ideas or talent).
Example: "The city has become a fertile growing ground for innovative startups, attracting entrepreneurs from all over the world."
Alternatives: "a rich breeding ground" or "a productive environment".
Hong Kong's close proximity to manufacturing hubs like Shenzhen, China, and its small but growing startup ecosystem will make it a fertile growing ground for wearable tech startups.
The context of rapid socio-economic change, left-center-coalition government and a perspective of rapid overall development of the welfare state was a fertile growing ground for extending the example of universal, public and preventive child and maternal care to the adult population as well.
Distant galaxies undergoing intense bursts of star formation have been shown by NASA's Chandra X-ray Observatory to be fertile growing grounds for the largest black holes in the Universe.
… be a fertile ground to grow some seeds of fresh thought and opportunity.
Extreme neo-Nazi groups have found the EDL and their fellow travellers to be a fertile recruiting ground and have managed to grow into double digits off the back of their anti-Muslim hysteria.
For now, though, the amazing socioeconomic makeup of the country provides a fertile ground for certain industries to grow in a manner not seen anywhere else.
Elizabeth Rossiello, chief executive of Bitcoin remittance service BitPesa, which allows workers overseas to send money home to Kenya and Ghana for a flat fee of 3% and says it is growing its user base by 60% month-on-month, believes the shortage of payment options in Africa make it a fertile ground in which Bitcoin can grow.
But learning so much about polymer chemistry and growing to appreciate what a fertile ground this field is, I completely changed my career goals and decided to go into academia.
Talent, the company says: skilled tech minds and a culture of above-average education which make for a fertile ground in which a company can grow.
