The phrase "ever growing popularity" is correct and usable in written English.
It can be used to describe something that is continuously increasing in popularity over time.
Example: "The new smartphone model has gained an ever growing popularity among tech enthusiasts."
Alternatives: "increasing popularity" or "growing popularity."
Those rituals are fading, though; as increasing numbers of Americans turn away from organized religion, heaven seems further away than ever, and the growing popularity of cremation and green burial shows that we're rethinking the ways we dispose of our corporeal selves.
In fact, sales are as strong as ever, or stronger, thanks to the growing popularity of indigenous festivals and pollera competitions.
It may well be the most widely-seen advert for charity shops ever".Thrift Shop" nicely captures the growing popularity of such stores, particularly in the English-speaking world.
In Germany the added construction costs of passive houses are modest and, because of their growing popularity and an ever larger array of attractive off-the-shelf components, are shrinking.
There are ever more possibilities online, too, with the growing popularity of role-playing games.
Livingston's family first noticed the poem's growing popularity two decades later and has insisted ever since that Livingston wrote it.
The growing popularity of gaming applications and ever-faster mobile carrier networks have called attention to an intriguing issue that is closely related to command input performance.
Despite the growing popularity of booking online, travel is becoming ever more specialized; niche markets for single-sex vacations, intergenerational getaways and specific adventures are increasing.
"Now, with the growing popularity of synthetic turf fields, their experience with nature will be less than ever".
The growing popularity of marathon readings.
With growing popularity has come growing complexity.
