Kiwifruit is a nutritional powerhouse packed with vitamins, fiber, and minerals. We gathered the most frequently asked questions about kiwis and, through our expertise and research, compiled clear, evidence-based answers. Whether you want to know about their health benefits, how to tell when a kiwi is ripe, or the best ways to store them, this guide has you covered.
What are kiwis good for?
Kiwis offer many health benefits:
- High in vitamin C: A single kiwi provides about as much vitamin C as an orange, which helps support the immune system.
- Good source of fiber: Kiwis are rich in dietary fiber, aiding digestion and gut health.
- Rich in potassium: This mineral helps maintain healthy blood pressure.
- Low in fat and sodium: Kiwis contain virtually no saturated fat or cholesterol, making them heart-friendly.
These nutrients mean kiwis can boost immunity and digestion while supporting heart health. In short, kiwis are a nutritious “superfruit” that helps your body stay healthy.
How many calories are in a kiwi?
A medium kiwi (about 69 grams) has roughly 42 calories. Larger kiwis (90–100 g) may have up to 50 calories each, depending on their size. Despite their sweet taste, kiwifruit are relatively low in calories.
How much vitamin C is in a kiwi?
Kiwis are famously high in vitamin C. A medium kiwi (~70 g) provides about 70–75 mg of vitamin C. (A larger kiwi can have over 80 mg.) This is often more vitamin C than an orange of the same size. Getting vitamin C from fruits like kiwi supports the immune system and skin health.
When are kiwis in season?
Kiwifruit season is mainly fall through spring. In the Northern Hemisphere, kiwis are typically harvested in late autumn and remain available through winter and early spring. (Harvests from the Southern Hemisphere, such as New Zealand’s, supply winter fruit.) This means you’ll often see kiwifruit in stores from fall into spring.
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Where are kiwis native to?
Kiwifruit originated in China (Southeast Asia). They were once called “Chinese gooseberries.” The familiar fuzzy green kiwi and the golden kiwi were first domesticated in China before being introduced to New Zealand and other countries. Today kiwis are grown worldwide, but their native home remains the forests of Asia.
How to know when a kiwi is ripe
Check ripeness by touch: a ripe kiwi will give slightly under gentle pressure. Press the outside skin lightly – if the fruit yields a bit, it’s ripe and ready to eat. If it’s still very firm and doesn’t give at all, it needs more time to ripen.
How to ripen kiwi fruit
- Room temperature: Let unripe kiwis sit at room temperature. They will usually soften in a few days.
Once ripe, move the kiwis to the refrigerator to store.
How to ripen kiwi fruit quickly
The quickest method is the bag trick: put unripe kiwis in a paper or loosely closed plastic bag with a ripe banana or apple. The trapped ethylene gas ripens the kiwis in roughly 1–2 days. Make sure the bag is slightly vented to avoid moisture build-up.
How to store kiwis
- Unripe kiwis: Store at room temperature or refrigerate to delay ripening. In the fridge, unripe kiwis can last about 4–6 weeks.
- Ripe kiwis: Once soft and ripe, move kiwis to the refrigerator. Ripe kiwis will last only a couple of days on the counter but can keep for 3–4 weeks in the fridge.
- Storage tip: Keep kiwis loosely packed (e.g. in a ventilated bag) and dry to prevent moisture and mold.
Do kiwis need to be refrigerated?
Not necessarily immediately. You can let kiwis ripen at room temperature, then refrigerate to prolong freshness. At room temperature, ripe kiwis spoil within a few days, but in the fridge they can last up to 3–4 weeks. In short, refrigeration is recommended for ripe kiwis if you want them to stay fresh longer.
How long does kiwi last in the fridge?
Stored properly in the refrigerator, ripe kiwis can stay fresh for about 3–4 weeks. Extension guidelines note that kiwifruit will keep “several days at room temperature and up to four weeks in the refrigerator”. The exact time depends on the fridge temperature and the fruit’s condition.
References
Oregon State University Extension: Preserving kiwifruit
Mississipi State University Extension: Happy Healthy Kiwi Fact Sheet
