How To Ripen Pears Is By Placing The Pears In A Paper Bag With A Couple Of Ripe Apples, And Kept Aside. Ripe Apples Normally And Naturally Emit Ethylene Gas Which Studies Have Proven To Make The Pears Ripening Rate To Be Much Faster Taking About 1-3 Days. Remember, To Check The Pears Regularly So As To Prevent Them From Getting Spoilt Due To Over-Ripening And Do Not Make Use Of Plastic Bags.