Put unripe tomatoes stem-side up in a paper bag with a few holes: The setup may help them ripen by keeping ethylene close to the fruit

Harvested tomatoes can continue to ripen thanks to the ethylene gas they emit. For the best results, arrange them in a paper bag with ventilation holes, stem side up. This technique captures the gas, speeding up the ripening while preventing excess moisture. Store the bag in a cool, shaded spot away from sunlight to enjoy a batch of perfectly ripe tomatoes.