Pomegranates don’t ripen after they’re picked. Unlike bananas or avocados, pomegranates are non-climacteric fruits, meaning they produce almost no ethylene gas and won’t convert starches into sugars once removed from the tree. The sweetness, juice content, and flavor a pomegranate has at harvest is all it will ever have. So if you’re hoping to leave one on the counter for a few days and get a sweeter fruit, it won’t work. What you can do is learn to pick the ripest pomegranate available and store it properly.
Why Pomegranates Can’t Ripen Off the Tree
Fruits fall into two categories. Climacteric fruits like bananas, apples, and avocados undergo a burst of respiration and ethylene production after harvest that triggers chemical changes: starches convert to sugars, cell walls soften, flavors develop. Non-climacteric fruits, including pomegranates, citrus, strawberries, and grapes, don’t do this. Their respiration rate stays constant or slowly declines after picking, with little to no increase in ethylene production.
This means the old trick of placing an unripe fruit in a paper bag with a banana has no meaningful effect on pomegranates. Ethylene from other fruits can trigger ripening in climacteric produce, but pomegranates simply don’t respond to it. The fruit needs to reach its full sugar and juice levels while still on the branch. Research on the Wonderful variety found that delaying harvest by just a few weeks increased juice content from about 30% to 39% and added significant weight to the fruit. Once it’s off the tree, those numbers are locked in.
How to Pick a Ripe Pomegranate
Since you can’t ripen one at home, choosing well at the store is everything. Here’s what to look for:
- Shape: A ripe pomegranate isn’t perfectly round. As the arils (seed sacs) swell to full size, they press against the inner chambers and give the fruit flattened, angular sides. A squarish shape is a sign the seeds are large and juicy.
- Color: Look for deep, vibrant shades of red, dark pink, or brick. The exact hue depends on the variety, but any greenish tint, especially around the stem end, means the fruit was picked too early.
- Weight: Pick up a few and compare. A ripe pomegranate feels heavy for its size because its arils are full of juice. A lighter-than-expected fruit may have dried out internally or started to decay.
- Skin texture: The skin should be smooth and firm, not soft or wrinkled. Small surface scratches and scuff marks are perfectly fine and don’t indicate spoilage. In fact, minor cracks or splits in the skin can actually signal ripeness, as the skin tightens and dries as the fruit matures.
- Crown: The flower-shaped crown on top should be dry and intact. If it’s missing, mushy, or falling apart, the fruit likely isn’t fresh.
- Scratch test: Gently scratch the skin with your fingernail. If it leaves a visible mark, the fruit is ripe.
Signs a Pomegranate Has Gone Bad
Pomegranate rot is tricky because it often develops inside the fruit with very few external clues. The main things to watch for are a paler-than-normal red color, brownish or yellowish discoloration on the rind, and a fruit that feels surprisingly light. That lightness comes from internal decay hollowing out the arils. Soft, mushy spots, visible mold around the crown, or a fermented smell are all reasons to toss it.
Storing Pomegranates to Keep Them Fresh
A whole pomegranate left on the counter at room temperature will stay good for about a week, but it won’t improve in that time. It will only slowly lose moisture and freshness. For longer storage, the refrigerator is far better. Commercial research shows pomegranates stored at around 41°F (5°C) with high humidity maintain their flavor, acidity balance, and weight for 8 to 12 weeks. Your home fridge typically runs close to this range.
Keep whole pomegranates in the crisper drawer, ideally in a loosely sealed plastic bag to hold in some humidity and prevent the skin from drying out. Once you’ve opened the fruit and removed the arils, store them in an airtight container in the fridge and use them within about five days. You can also freeze arils in a single layer on a baking sheet, then transfer them to a freezer bag for several months of storage.
If Your Pomegranate Isn’t Sweet Enough
Because you can’t make a pomegranate sweeter after the fact, your best options are working with what you have. Tart pomegranate arils pair well with honey, yogurt, or sweet dressings that balance the acidity. You can also sprinkle a small amount of sugar over the arils and let them sit for 10 to 15 minutes to draw out juice and create a light syrup. Pomegranate juice from less-sweet fruit works well reduced into a molasses-like syrup on the stove, where concentration intensifies whatever sweetness is present.
For those growing pomegranates at home, the takeaway is simple: leave the fruit on the tree as long as possible. Harvesting later in the season produces heavier fruits with substantially more juice. The skin darkening, hardening, and even beginning to crack are signs the fruit is at peak ripeness and ready to pick.