The phrase "already fruitful" is correct and usable in written English.
It can be used to describe a situation or effort that has begun to yield positive results or benefits before the expected time.
Example: "The new marketing strategy has proven to be already fruitful, generating significant leads within the first month."
Alternatives: "already productive" or "already yielding results".
Crowing delightedly that our morning hunt had already proved fruitful, my friends and I plowed on deeper into the woods, following Giorgio and Bruno, and, of course, Mina (she of the extraordinary nose).
VR is already finding fruitful use in the enterprise and select consumer applications.
Claudio may be as sly as Leicester is foxy, and with a 3-year £1.5 million contract, should the perennial footballing powers not be worried as the weaker clubs already bearing fruitful success feel the changing winds of financial abundance?
The project has already yielded fruitful results: Ferrarese says astronomers had only identified approximately 1,600 galaxies in the Virgo Cluster before NGVS, but by using CFHT's powerful camera over a huge 100-square-degree swath of the sky (an area larger than 500 full moons), researchers have now cataloged more than three times as many previously unseen galaxies.
Honeybees already proved fruitful to study how brain connectivity is eventually mapped to behaviour e.g., [27], [28], meaning that, if that were the case, a rather simple unconditioned response would help to identify, and eventually also to characterize, the neural correlates of such a form of learning in the honeybee brain.
In contrast to the use of other biologically derived molecules like simple aa's 9 or nucleobases 10 that has already proved fruitful, the design of peptide-based open frameworks is still in its infancy.
Telescoping time and place, and splicing travelogue with memoir and the classical past, has already proved a fruitful autobiographical mode for Stothard.
