While they're named "summer squash," they have a long harvest season from early summer well into late fall barring disease or pest attacks. Keeping the plants picked while fruits are young and tender also promotes production. 
 
Yellow zucchini keeps its bright sunny color when cooked, so you can use yellow zucchini just like green but will end up with a brighter, more colorful dish. It is also wonderful when combined with green zucchini, creating an appealing contrast of color.

Sold in a 2.5" pot.