The phrase "a still growing" is not correct in standard written English.
It can be used when describing something that continues to increase or develop, but it should be rephrased for clarity.
Example: "The population of the city is a still growing concern for local authorities."
Alternatives: "still increasing" or "continuously growing".
For each of them, a (still growing) number of indices and metrics have been proposed in the literature and standards.
Dealing with a nonexistent problem by raising interest rates now, they say, could push a still growing economy into outright recession.
That was the first year of a still growing hub of theater activity, from staged public readings to private training institutes (even for critics).
A still growing number of software concepts and frameworks have been proposed to meet the challenges in the development of more and more complex robotic systems, like humanoids or networked robotics.
With some 160 objects and works of art, from a still growing collection already six times that size, the show sets out to illustrate 1,000 years of Islamic artistic and scientific accomplishments in countries from China to Spain.
Even if part of the heritage of the Enlightenment is a still growing appreciation of other cultures, other points of view, we nevertheless cannot accept the relativity and contingency of all value and still take our own values seriously.
It's the work of a band still growing".
Even with one partial stem, there is a chance of still growing a first rate plant.
These are not criticisms - they are understandable facts about a young man still growing in a physical and footballing sense.
For a long time there has been a huge — and still growing — distance between Christian and secular music industries.
Also, we as a species are still growing unsustainably.
