Duncan Grapefruit Tree
Only 5 in stock
Due to state and federal agricultural regulations, Backyard Citrus Trees is unable to ship citrus trees to the following locations: AK, AL, AZ, CA, HI, LA, TX, PR
The Duncan Grapefruit is one of the original Florida grapefruit varieties, prized for its rich, classic citrus flavor and exceptional juiciness. Known for producing large fruit with a bold sweet-tart taste, this heirloom variety has remained a favorite among grapefruit enthusiasts for generations.
With its vigorous growth, attractive evergreen foliage, and dependable harvests, the Duncan Grapefruit Tree is an excellent choice for backyard orchards and home landscapes. Its fragrant spring blossoms and productive nature make it a rewarding tree for gardeners looking to enjoy fresh, homegrown grapefruit throughout the season.
Parentage: Grapefruit
Harvest season: December–May
Growing zones: 9–11
Pollinator needed: No
Seeds per fruit: 30–70
Growth rate: Moderate
Botanical name: Citrus × paradisi 'Duncan'
Hardiness: Cold Hardy to the Mid-20°F
Mature height - Full Size: 20+ ft.
Mature height - Semi-dwarf: 12–15 ft.
Mature height - Dwarf: 8–10 ft.
Size when shipped: 26–33"
Each of our trees is hand-grafted and raised with care at our nursery in Central Florida. We guarantee that you will receive a high-quality, healthy citrus tree free of pests or disease.
Trees cannot be shipped in temperatures below 40°F and will be held until the weather allows for shipping.
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Shipping & Delivery
Your tree is carefully grown, inspected, and packaged to arrive healthy and ready for planting.
- Ships within 24–48 business hours
- Shipping is included in the product price
- Each tree is individually packaged and secured to prevent damage during transit
- Tracking information is provided once your order ships
- Local pickup is available by appointment
Shipping Restrictions: Due to agricultural regulations, we are unable to ship citrus trees to Alaska, Alabama, Arizona, California, Hawaii, Louisiana, Texas, or Puerto Rico.
Planting & Care
With proper care, your citrus tree can provide years of beautiful growth and fresh fruit.
For best results:
- Plant in a location that receives at least 6–8 hours of sunlight daily.
- Use well-draining soil or a quality citrus potting mix.
- Water consistently while the tree becomes established.
- Feed regularly with a citrus-specific fertilizer.
- Protect young trees from freezing temperatures.
Need detailed care instructions?
Download our Citrus Tree Planting & Care Guide for complete planting, watering, fertilizing, pruning, and long-term care recommendations.
About Our Trees
Why is the Duncan Grapefruit Tree considered a classic grapefruit variety?
Can the Duncan Grapefruit Tree be grown in a container?
How do I keep my Duncan Grapefruit Tree healthy and productive?
How can I protect my tree from citrus greening and pests?
We highly recommend protecting your young trees from Asian psyllids and citrus greening (HLB) with a tree defender. For more information visit: www.thetreedefender.com
Should I mulch around my tree?
Do not pile mulch against the trunk. Excess moisture around the trunk can lead to decline, disease, and possible tree loss.
Grown with Care
At Backyard Citrus Trees, every tree begins with a commitment to quality. With more than 50 years of experience in the citrus industry, we carefully grow and nurture each tree to provide homeowners with healthy, vigorous plants that are ready to thrive.
Our trees are grown using proven horticultural practices and quality rootstocks trusted throughout the citrus industry. Before leaving our nursery, every tree is inspected to ensure it meets our standards for health and quality.
Read our Reviews
"We purchased a lemon tree for our patio, and it has been thriving since day one. The planting guide was incredibly helpful, and the tree arrived healthy with no damage during shipping. Highly recommend Backyard Citrus Trees if you're looking for quality citrus trees."
Jennifer L.
"I was honestly nervous about ordering a citrus tree online, but it arrived in perfect condition. The tree was healthy, well-packaged, and even larger than I expected. It was easy to plant, and it's already putting out new growth. I wouldn't hesitate to order another tree from Backyard Citrus Trees."
Sarah M.
"My Rio Red Grapefruit Tree arrived quickly and looked fantastic. The team answered my questions before ordering and made the entire process easy. You can tell they really care about the quality of their trees. I'm already planning my next purchase."
