"fertile" is correct and usable in written English.
You can use it to refer to something that supports growth in some way, either literally (such as land) or figuratively (such as ideas). Example sentence: The fertile soil in the garden yielded a bountiful harvest this year.
And she read art historian Aby Warburg's lecture on the frescoes: "He completely understood that that moment where opposites meet is the most fertile of points for the mind, for the soul and for the arts".
"The mixture of the coalition and the financial crisis and the consequent cuts means it's a darker time and more fertile ground for satire.
He found that perceptions of masculinity altered across the menstrual cycle, with "a preference for more masculine faces when women are fertile".
For the farmers on western Nicaragua's volcanic range, who tend to favour beans over almost all other crops making a living from just beans is far from stable, despite the fertile soils.
It is making an unsaid promise that the happy and fertile private life on display will translate into a virtuous period in office.
The unions have also issued a warning that such a well of disaffected, alienated young people – particularly in the nationalist community – will be fertile recruiting territory for republican dissidents.
Fertile fields famed for their melons, wheat and barley are now parched wastelands after irrigation canals were destroyed by shelling.
It's not surprising that the civil wars of history have been fertile ground for writers; and here are 10 great examples.
And the age of austerity decreed by Europe's leaders as the answer to runaway debt, soaring deficits and a failing euro also supplies fertile ground for the populist campaigners.
It took the joyous irreverence of Wendy Cope's "Waste Land Limericks" – Iain yelped with laughter when I recited them to him – to give me the brass neck to attempt "A Fertile Sea", my own impertinent response to Eliot's masterwork.
The locals once tended tiny fields of fertile soil down here, but now the copper mines have lured all the able-bodied men and women away.
