Bananas ripe and green, and ginger-root,
Cocoa in pods and alligator pears,
And tangerines and mangoes and grape fruit,
Fit for the highest prize at parish fairs.
Set in the window, bringing memories
Of fruit-trees laden by low-singing rills,
And dewy dawns, and mystical blue skies
Connecting with McKay’s  Jamaican roots , these fruits are typically found in the tropics. These include: 
 
 Bananas 
 Ginger-roots 
 Cocoa 
 Avocados 
 Tangerines 
 Mangoes 
 Grape Fruits 
 
 McKay’s use of imagery and color, (a staple of  his work ), provide a sharp contrast between the tropics in Jamaica, where these would be common, and the somewhat gloomy and dull street life of New York City. 
 By mentioning that these would be fit for a high prize in a church fair, he points to their scarcity in city life. 

Tropics in New York