Ripen tomatoes on a sunny windowsill
April 3, 2021
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This is a common belief but it is untrue–that not-yet-ripe tomatoes can be hurried to juicy perfection by a few days in the sun. Sunlight does not help and can in fact be harmful if the tomato gets too warm or suffers from sun scald. Sure, those pretty tomatoes look nice sitting on a windowsill, but there is a way to hurry ripening that actually works. Put the ‘maters in a sealed paper bag for a few days, ideally with a ripe banana.
Say what? You see, fruit (tomato is, technically, a fruit) naturally gives off ethylene gas as part of the ripening process. It’s completely natural and perfectly harmless and by keeping the tomatoes in a bag you concentrate the ethylene and hasten the ripening. And further, bananas are the champs at giving off ethylene so including one speeds things up even more.