How to Grow Nagami Kumquat
iNaturalist
Nagami Kumquat
Fortunella margarita
fruitNagami kumquat is a small citrus tree producing bright orange, oval fruits about 1-1.5 inches long with sweet edible skin and tart flesh. Native to China, it's one of the most cold-hardy and popular kumquat varieties for home gardens. The tree is ornamental year-round with fragrant white flowers and dense foliage.
When should you plant Nagami Kumquat in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Nagami Kumquat timeline · Pittsburgh, PA (Zone 6b)
-
Plant Nagami Kumquat
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Nagami Kumquat
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Nagami Kumquat dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8b-11, with cold tolerance to 12-15°F (-11 to -9°C)
Sign up free to see if Nagami Kumquat grows in your zone — and get a personalized planting timeline.
Get my Nagami Kumquat timeline →Growth Stages
Establishment
6-12 monthsYoung tree developing root system and branch structure; minimal flowering
Water regularly, avoid fertilizer first few months, mulch around base, prune competing branches
Vegetative Growth
1-2 yearsTree building canopy with dense glossy green foliage and strong branching
Apply balanced citrus fertilizer (10-10-10) monthly during growing season, prune for shape, stake if needed
Flowering
4-6 weeks, typically March-MayFragrant white 5-petaled flowers appear in spring clusters; highly fragrant
Maintain consistent moisture, reduce nitrogen to encourage flowering, do not prune during flower production
Fruit Development
4-5 monthsSmall green fruits form and gradually enlarge over 4-5 months
Thin fruit to 4-6 inches apart for larger fruits, maintain regular watering, apply citrus-specific fertilizer low in nitrogen
Ripening & Harvest
2-4 weeksFruits turn bright orange, sweet aroma develops, skin becomes fragrant
Harvest when fully colored, allow to ripen on tree for best flavor, one crop per year in spring
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with neem oil or horticultural oil in dormant season; remove manually with brush
-
Increase humidity, spray foliage with water, apply miticide if severe, encourage predatory mites
-
Yellow sticky traps, spinosad spray on new growth, remove heavily affected leaves
-
Yellow sticky traps, neem oil spray, insecticidal soap, encourage natural parasites
-
Spray with 70% isopropyl alcohol, neem oil, horticultural oil, or insecticidal soap
Uses
Fresh eating and marmalade
CulinaryThe entire fruit is edible, with sweet thin skin and tart juicy flesh creating a unique flavor balance perfect for eating fresh, candying, or making marmalade and preserves. [source]
Cocktails and beverages
CulinaryNagami kumquats add distinctive citrus flavor and visual appeal to cocktails, infused water, and juice blends; can be sliced or whole for garnishes. [source]
Immune support and digestion
MedicinalRich in vitamin C, dietary fiber, and antioxidants, kumquats traditionally support digestive health and immune function, with the peel containing beneficial essential oils and flavonoids. [source]
Ornamental and air freshening
HouseholdThe Nagami tree serves as an attractive ornamental with year-round visual interest from flowers, fruit, and foliage; fragrant flowers and fruits naturally freshen indoor and outdoor spaces. [source]
Candied fruit and decorative preservation
CraftWhole kumquats can be candied, crystallized, or preserved in syrup for decorative culinary uses, cake toppings, and gift-quality preserved foods. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest kumquats from November through April when fully orange and slightly soft to touch. Squeeze gently—ripe fruits yield slightly to pressure. Cut with pruners rather than pulling to avoid branch damage. Fruits can remain on tree for extended periods if left unharvested.
Fun Facts
- 🌱 The name 'kumquat' comes from the Cantonese 'gam gwat' meaning 'golden orange,' and Nagami specifically means 'long fruit' in Japanese, referring to its elongated oval shape.
- 🌱 Nagami kumquats are one of the few citrus fruits where the sweet, edible skin contains more sugar than the acidic flesh—you eat it whole with peel intact, unlike other citrus.
- 🌱 The tree can survive winter temperatures down to 12-15°F (-11 to -9°C), making it the most cold-hardy kumquat variety and suitable for growing in containers that can be moved indoors in harsh climates.
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Nagami Kumquat planting timeline
Tell us your zip code and we'll calculate exactly when to start Nagami Kumquat seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Nagami Kumquat timeline →