North America Non-native Plant

Oval Kumquat

Botanical name: Fortunella margarita

USDA symbol: FOMA2

Life cycle: perennial

Habit: shrub

Native status: Non-native, reproduces and persists in the wild in Puerto Rico  

Oval Kumquat: A Sweet and Sour Addition to Your Warm Climate Garden If you’ve ever wondered about growing your own tiny citrus treasures, the oval kumquat (Fortunella margarita) might just be the perfect candidate for your garden. This charming little shrub produces bite-sized fruits that pack a surprising flavor punch ...

Oval Kumquat: A Sweet and Sour Addition to Your Warm Climate Garden

If you’ve ever wondered about growing your own tiny citrus treasures, the oval kumquat (Fortunella margarita) might just be the perfect candidate for your garden. This charming little shrub produces bite-sized fruits that pack a surprising flavor punch – sweet skin with tart flesh that creates a delightful taste experience unlike any other citrus.

What is an Oval Kumquat?

The oval kumquat is a perennial evergreen shrub that typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet in height. Don’t let its modest size fool you – this little powerhouse can live for decades when properly cared for, rewarding you with years of fragrant blooms and tasty fruits.

Where Does It Come From?

Originally native to southern China and Southeast Asia, the oval kumquat has traveled far from its homeland. In the United States, it has established itself in Puerto Rico, where it reproduces naturally and persists in the wild without human intervention.

Why Consider Growing Oval Kumquat?

There are several compelling reasons why gardeners in warm climates fall in love with oval kumquats:

  • Unique edible experience: Unlike other citrus, you eat the whole fruit – peel and all – for a sweet-tart flavor combination
  • Ornamental appeal: Glossy evergreen foliage, fragrant white flowers, and colorful orange fruits provide year-round interest
  • Compact size: Perfect for smaller gardens, containers, or as a decorative hedge
  • Pollinator magnet: The fragrant blooms attract bees and other beneficial pollinators to your garden
  • Conversation starter: Your guests will be intrigued by these unusual mini-citrus fruits

Garden Design and Landscape Use

Oval kumquats shine in Mediterranean-style gardens and citrus collections. They work beautifully as:

  • Specimen plants in mixed borders
  • Container plants on patios or decks
  • Informal hedges or privacy screens
  • Accent plants in warm-climate landscapes

Growing Conditions and Care

Success with oval kumquats depends on providing the right environment:

Climate Requirements: These shrubs thrive in USDA hardiness zones 9-11, where temperatures rarely drop below 20°F. They need warm temperatures and can’t tolerate hard freezes.

Light and Soil: Give your kumquat full sun exposure and well-draining soil. They’re somewhat drought-tolerant once established but perform best with consistent moisture during the growing season.

Planting and Care Tips

  • Timing: Plant in spring after the last frost date
  • Spacing: Allow 6-8 feet between plants if growing multiples
  • Watering: Water regularly during the first year, then reduce to occasional deep watering
  • Fertilizing: Feed with citrus fertilizer during the growing season for best fruit production
  • Pruning: Light pruning after harvest helps maintain shape and removes dead wood
  • Winter protection: In borderline zones, protect from cold winds and consider container growing for easier winter protection

A Note About Native Alternatives

While oval kumquats can be grown responsibly in appropriate climates, consider exploring native alternatives that provide similar benefits to local wildlife. Native plants like American beautyberry, elderberry, or native viburnums offer berries for wildlife while supporting local ecosystems.

The Bottom Line

Oval kumquats offer a unique combination of ornamental beauty and edible rewards for gardeners in warm climates. Their compact size, attractive appearance, and unusual fruits make them an interesting addition to the right garden setting. Just remember that success depends on providing adequate warmth and protection from freezing temperatures. If you’re in the right climate zone and looking for something a little different, this sweet-and-sour shrub might just be the perfect conversation piece for your garden!

Oval Kumquat

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Sapindales

Family

Rutaceae Juss. - Rue family

Genus

Fortunella Swingle - kumquat

Species

Fortunella margarita (Lour.) Swingle - oval kumquat

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA