Oroblanco Grapefruit Tree
The Oroblanco Grapefruit is the most popular white fleshed variety and is also known as the “Sweetie”. The fruit is large, seedless, oblong or round shape, with smooth yellow skin. The rind is very thick and a creamy white color. The flesh is juicy and sweet, lacking the bitterness found in many grapefruits. A very deliciously flavored fruit that tastes like the scent of its white color flowers. Very fragrant flowers and beautiful shiny green foliage.
Not compatible with your zone (2a)
General Plant Information
Oroblanco Grapefruit Tree Information and Care
The Oroblanco Grapefruit tree is a citrus that produces large, yellow skin, white flesh fruits that are round to ovate fruits and about 4 to 5 inches in diameter. The skin is smooth and thick, containing aromatic oils that come from lightly pebbled pores.
Oro Blanco grapefruits are a natural hybrid variety whose name Oro Blanco means “white gold” in Spanish.
A hybrid, having the parentage of an acidless pummelo and a white-seeded grapefruit developed at UC Riverside in 1958. The patent is held by the University of California, and the variety was released in 1980. In addition, this tree does not do well in the cold but adapts quickly to most environments.
Size and Spacing
Plant most citrus trees about 10 – 15 feet apart. Some varieties like Grapefruits and Oranges can grow larger.
Planning is the most important step when planting a tree. Plant your tree where it has enough space to grow to its full potential. Otherwise, your tree will grow into your surrounding trees. A tree that can grow taller with faster growth will overshadow nearby trees. You may need to move other trees to allow for the one that is thriving rather than cutting back one that naturally grows fast and tall.
Additional Information
Botanical Name : Citrus grandis Osbeck × C. Paradisi Macf.Watering : Regular
Sun Exposure : Full Sun
Plant Type: Evergreen
USDA Hardiness Zones: 8-11
Pollination: Self-Fruitful / Self Pollinating
Planting Information
Soil and Planting: Plant in soil that drains well. Dig a hole that is as deep as the tree’s roots and at least twice as wide.
Place the tree in the hole and backfill around the plant’s roots with a mixture of the native soil and high-quality planting mix that has washed sand and organic fertilizer.
Create a basin around the roots drip zone so that water collects. Water deeply until the roots and nearby soil is saturated and reaches field capacity.
Plant Care Information
Watering Basics
Irrigation Management Basics
Water Frequency – The frequency of water depends on seasonal weather conditions such as temperature, wind speed, and humidity, as well as factors like soil type and plant health. Sandy soils dry faster than clay soils.
In General
- Water newly planted trees 2 times per week during the Spring and Fall seasons.
- Increase the frequency when temperatures increase during the Summer
- Reduce frequency once temperatures drop in Winters
Quantity of Water – Provide enough water to saturate the soil around the tree’s roots, then drain to field capacity. Clay soils hold more water than sandy soils.
In General
- Give about 3 – 5 gallons of water for a 5-gallon size plant,
- 15 gallons of water for a #15-size container plant
- 25 gallons for a #25 depending on soil type.
Types Automatic Irrigation Systems – Help reduce operator error
Bubblers, sprinklers, and drips are the most common types of automatic irrigation systems. The duration a system is run depends on the emitter’s flow rate.
Fertilizer and Plant Nutrition
“NPK”
NITROGEN, PHOSPHORUS & POTASSIUM
NPK are the 3 macronutrients most used by plants and are represented numerically on the label. Apply this fertilizer with a higher ratio of Nitrogen to Phosphorus and Potassium in the Spring and Summer to promote plant growth. Use a fertilizer with a higher ratio of Phosphorus and Potassium to Nitrogen in the Winter or before plants flower to improve yields.
WHEN TO FERTILIZE
Use 8-4-4 every three months. Spring (March- April) through the fall
Use 3-12-12 Harvest Booster before plants flowering or during winter dormancy. (December – January)
HOW MUCH FERTILIZER
Apply 1 cup (150 grams) for every 1” diameter of the trunk or 15-gallon size Apply 2 cups (300 grams) for every 2” diameter of the trunk or 25-gallon size
HOW TO FERTILIZE
Instructions:
Winter Pruning and Summer Thinning
Prune your tree to allow light into its center for proper growth and fruit production.
Prune fruit trees in the Winter to maintain size and shape to prepare for Spring growth. Thin the tree in the Summer, and remove excessive fruits. Remove any dry twigs and branches. Cut off any new growth below the graft or very low in the tree, this will direct the plant’s energy to its main branches. Thin your trees during the Spring and Summer seasons to ensure the plant’s energy is directed as desired. Harvest ripe fruit to prevent undesired pests.
Harvesting and Pest Management
The basics of integrated pest management is cleanliness and the use of a combination of methods. This means we use of organic pesticide when the pest population reaches a threshold that requires action. Horticultural oils such as Neem oil is an organic pesticide that controls tiny, soft bodied insects. Use organic Bordeaux and Liqui-cop to manage fungus causing diseases such as powdery mildew, rust, and leaf-curls.
Keep a clean environment, free of weeds and dropped fruit that host insects or attract animals. Harvest when fruit reaches size and store indoors. Use repellants and bird netting to protect your harvest from other animals.
Sun Exposure: Full Sun
- Citrus trees require at least 5 hours of direct sunlight for proper growth and fruit production
- Afternoon Sunlight is more intense than the morning sun, therefore stress and damage can result if there is a lack of sufficient water.
- Lack of water combined with highly reflective surfaces like cinderblock walls, patios, fencing, etc can exasperate the breakdown of chlorophyll resulting in yellowing leaves. This is due to the building up of heat, and loss of water causing stomates in the leaf to close.
- Proper irrigation frequency and quantity, along with cooling of surrounding areas can assist in negating the effects of intense sunlight.
- Additionally, creating shade can assist in preventing tree damage caused by excessive sunlight and heat build-up
Limited Guarantee and Returns
Compatibility
The two factors that determine if a deciduous fruit trees will grow well and produce fruit in a certain area are the Chill Hour Requirement and the Cold Hardiness. “Chill hours” are the amount of cold a deciduous fruit tree need to produce fruit. This is measured in the number of hours below 45 degrees Fahrenheit a plant must experience during its winter dormancy. Paradise Nursery only grows Low Chill fruit trees that meet the chill requirements of all areas of the United States.
The second factor is Cold Hardiness. Cold Hardiness refers to the minimum temperature a plant can tolerate. The USDA’s Cold Hardiness Zones indicate the average minimum winter temperatures of areas. Based on the shipping zipcode, our website will only allow you to add plants to your cart that grow within your USDA Hardiness Zone, and tolerate your climate.
Pollination & Propagation
(Grafting/Cutting) Most of Paradise Nursery’s edible plants are self-fruitful. Self-pollinating trees do not require an additional tree to produce fruit. For your convenience, we have indicated which trees require a pollinator, and their associated pollinators. Only the sweet cherries, avocados, and some plums require a pollinator. All of our other propagated edible plants do not require a pollinator. All of our edible plants are either grown from cuttings, budded, or grafted. This way, we can ensure that our plants are high quality and fruit immediately. Plants will generally begin fruiting within a year of planting.
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