Peaches & Nectarines

Prepared by Nancy Doubrava, HGIC Horticulture Specialist, Bob Polomski, Extension Consumer Horticulturist, and Greg Reighard, Associate Professor of Horticulture, Clemson University. (New 06/99.)

HGIC 1354

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Growing peaches, (Prunus persica) and nectarines (P. persica) in South Carolina can be both fun and rewarding, providing you with the opportunity to put part of the lawn area to good use by producing a fruit that is both enjoyable to eat and healthful. The success of your peach-growing enterprise will depend largely on the care and attention the trees are given throughout their lifetimes.

Nectarines are nothing more than fuzzless peaches, and their culture is the same as peaches. For simplicity, the term peach refers to both peaches and nectarines in this fact sheet. More information is available in HGIC 1355, Pruning Peaches & Nectarines, and HGIC 2209, Peach Diseases.

Selecting A Site

Sunlight, and plenty of it, is the key to maximizing fruit production. Pick an area where the trees will be in the sun most or all of the day. The early morning sun is particularly important because it dries the dew from trees, thereby reducing the incidence of diseases. If the planting site does not get plenty of sun, then you can not expect the best performance from the trees. Avoid very steep or badly eroded hillsides and areas having poor air circulation and poor soil water drainage.

Purchasing Trees

Remembering the adage "You get what you pay for" is important when buying peach trees. Often, bargain plants are not healthy or may not be a cultivar adapted to your area. Buy only recommended varieties from a reliable source. Keep the following points in mind when purchasing peach trees:

  • Select healthy 1-year-old trees, about 3 to 4 feet tall and with a good root system. A small tree with a good root system is more desirable than a large tree with a poor root system.
  • Trees that are 2 years old or older do not usually grow as well as 1-year-old trees. Frequently, older trees do not have sufficient buds on the lower portion of the trunk to develop a good framework.
  • Do not purchase trees that appear stunted, poorly grown, diseased or insect-injured.
  • Check the trees closely to make sure that you are getting the cultivar and rootstock that you desire.

Variety Selection

Pollination: Peach flowers are self-fruitful. Therefore, it is not necessary to plant more than one peach variety in the backyard.

Chilling Requirements: Stone fruit trees such as peaches develop their vegetative and fruiting buds in the summer, and as winter approaches, the buds go dormant in response to both shorter days and cooler temperatures. These buds remain dormant until they have accumulated sufficient chilling hours (temperatures of 45 °F or less). Varieties with low chilling requirements are recommended for coastal areas. As long as there have been sufficient chilling hours, leaves and buds develop normally. Without enough chilling hours, trees may develop one or more of the following symptoms: (1) delayed leafing out and flowering; (2) reduced fruit set and quality; (3) increased small, misshapen fruit ("buttoning").

Rootstocks:

Lovell: For most of South Carolina, has been the best rootstock.

Nemaguard: This rootstock is used in the Coastal Plains, because of widespread root-knot nematode problems.

Guardian: This new rootstock has performed well on soils infested with ring and root-knot nematodes. Guardian has proven to be superior to other rootstocks on nematode-infested soils.

Recommended Varieties: There are peach varieties adapted to most areas of South Carolina (see table, below). Varieties with low chilling requirements are recommended for the coastal areas.

Peach & Nectarine Varieties Recommended for Home Use in South Carolina
Variety Area1 Characteristics Harvest2

*Nectarine
1Major land resource areas of South Carolina; M - Mountains; P - Piedmont; SR - Sandhills and Ridge; CP - Coastal Plains.
2Average ripening dates for Byron, Georgia, which are similar to the Sandhills and Ridge region. Dates may vary according to season. Piedmont and mountains are 7 to 10 days later, and Coastal Plains are 7 to 10 days earlier.

Flordaking CP Large clingstone; medium quality, yellow flesh May 5-10
Springcrest SR,CP Small clingstone; medium quality; deep red blush, bright yellow undercolor; medium quality. May 10-20
Armking* CP Medium-size fruit for early season; solid red-color skin with yellow flesh May 15-25
Junegold SR,CP Large clingstone with bright reddish blush; fine texture, yellow flesh May 24-30
Dixiered M,P,SR Medium size, round clingstone: flesh yellow, skin red; good quality. June 5-15
Juneprincess* M,P,SR Medium-large freestone; 80-90% bright red. June 10-17
Redhaven M,P,SR Medium size; very red skin; skin is tough and firm; freestone; very good for picking, canning and freezing; non browning. June 20-30
Harvester SR,CP Medium to large size with bright red skin color; has golden yellow flesh for excellent quality; freestone. June 25-July 2
Roseprincess* M,P,SR White flesh; semi-freestone. June 25-July 2
Nectar M,P,SR Excellent quality freestone, white flesh peach; outstanding for its sweetness and aroma. June 25-July 2
Redglobe M,P,SR Medium to large, attractive deep-red freestone; yellow flesh; good quality. July 5-15
Redgold* All Large size, freestone fruit; excellent quality yellow flesh July 5-15
Georgia Belle M,P,SR Medium to large, white flesh freestone; skin red blush; excellent for eating; fair for freezing and poor for canning July 20-31
Redskin All Medium to large, freestone fruit; yellow flesh with red at pit; good quality; melting texture but firm; very attractive; good for canning and freezing. July 20-31
Fantasia* SR,CP Large size, freestone fruit; yellow flesh; very high quality; firm fruit; excellent color. July 20
Jefferson M,P,SR Reliable producer; yellow flesh peach of excellent quality; buds and flower. July 25-August 5

Soil Requirements

Although peach trees will grow well in a wide range of soil types, a deep soil ranging in texture from a sandy loam to a sandy clay loam is preferred. Peach trees are extremely sensitive to poorly drained soils. In areas of poor drainage, roots will die, resulting in stunted growth and eventual death of the tree.

Most fruit trees, including peaches, grow best where the soil pH is near 6.5. Since the natural pH of most South Carolina soil is below this level, it is necessary to incorporate lime before planting to raise the pH to the desired level. Follow soil test results to determine soil pH and fertility levels.

Soil Preparation & Planting

Peach trees should be planted while fully dormant from early December to mid March. Because root growth may occur during relatively mild winters, plant as early as possible so the roots will establish before spring growth begins.

When the fruit trees arrive from the nursery, open the bundles immediately. Soak the roots in water for 6 to 12 hours if they are not moist. The trees should then be planted if the soil is not too wet.

If the soil is not prepared where the trees are to be planted, or the ground is too wet, heel the trees in by placing them in an open trench deep enough to cover all roots. The north side of a building is the best place for heeling because the trees will remain dormant longer. Place soil over the roots to the depth they will be planted in the garden or landscape.

Before planting, prepare the soil thoroughly by plowing or spading followed by disking or raking to smooth the surface. If you have not adjusted the soil pH to 6.5 previously, liming should be done before you prepare the soil so that the lime will be mixed throughout the planting area. When added to the surface and not plowed in, lime takes years to move down into the soil. Lime an area 10 feet by10 feet where each tree is to be planted. Similar to lime, phosphorus moves down through the soil slowly and thus should be incorporated along with lime before planting based on soil test results.

When planting, dig holes large enough to receive roots freely without cramping or bending from their natural position. Before planting, cut off all broken or damaged roots with a sharp knife or pruning shears. Keep root pruning to a minimum. Set the plants at about the same depth they were planted at the nursery so that the uppermost root is not more than 1 to 2 inches underground. Work the soil in and around the roots. When the hole is half-filled, firm the soil with your feet before you finish filling the hole. When the hole is filled, pack the soil firmly. Do not leave a depression around the tree. Do not place fertilizer in the planting hole or fertilize immediately after planting.

Care After Planting

After planting, apply sufficient water to thoroughly soak the soil in the area of the tree roots. This watering will help bring the soil into closer contact with all sides of the roots and eliminate air pockets around the roots. Keep weeds out of a 3-by-3-foot area around the tree because they compete with the tree for moisture and nutrients during the growing season. This will also keep mowers away from the tree and reduce trunk damage. Mulching will help to control weeds as well as conserve moisture.

Peaches and nectarines are usually trained to an open-center system. Correctly pruned trees will have a wide open vase shape. This allows sunlight penetration, and air movement and improves spray coverage. More information is available in HGIC 1355, Pruning Peaches & Nectarines.

Fertilization

Fertilizing peaches starts with adjusting the soil pH to 6.5 before planting. Incorporate the lime at least a foot deep and over an area about 10 feet by 10 feet where the tree will be planted. In March after the trees have been planted and the soil settled by a drenching rain, broadcast 1 cup of 10-10-10 fertilizer over an area 3 feet in diameter. Do not allow fertilizer to accumulate around the tree trunk.

In early June and again in early August, broadcast ½ cup of calcium nitrate or equivalent over an area 3 feet in diameter. Beginning the second year, fertilize the trees twice a year in early March and around the first of August. Use these rules of thumb for the two fertilizer applications:

Early March application: Apply 1 cup of 10-10-10 fertilizer per year of tree age to a maximum of 10 cups for mature trees.

August application: Apply 1 cup of calcium nitrate or equivalent per year of tree age to a maximum of 4 cups for mature trees. Do not make the August application if the crop was lost to a freeze. Do not apply until the harvest of late-season varieties is completed.

Thinning to Increase Fruit Size

A peach tree cultivated under favorable conditions will set more fruit than it is capable of successfully carrying to maturity. Branches may break and the fruits typically have poor color and taste. To prevent limb breakage and ensure good fruit quality, excess fruits must be removed or thinned. Hand-thin the tree about four weeks after full bloom, spacing the peaches about 6 inches apart on the limb. When thinning by hand, grasp the stem or branch firmly between the thumb and forefinger and pull the fruit off with a quick motion of the second and third fingers.

Diseases & Insects

It is very difficult to grow-top quality peaches in the home orchard unless a rigid pest control program is maintained. A spray program should begin with dormant sprays and be carried through the growing season. The most damaging peach disease is a fruit rot commonly called brown rot. Other diseases of peaches include scab, Rhizopus rot, leaf curl, bacterial spot, peach phony, oak root rot and nematodes.

There are a number of insects that cause damage to peach flowers, fruit, limbs, twigs, and trunks. Among the most destructive in home garden peach plantings include peach tree borers, plum curculio, scale, catfacing insects (stink bugs and tarnished plant bugs), oriental fruit moths, Japanese beetles and the green June beetle. A spray program is essential in controlling insects and disease if you plan to be a successful peach grower.

Excerpted from the South Carolina Master Gardener Training Manual, EC 678.

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This information is supplied with the understanding that no discrimination is intended and no endorsement of brand names or registered trademarks by the Clemson University Cooperative Extension Service is implied, nor is any discrimination intended by the exclusion of products or manufacturers not named. All recommendations are for South Carolina conditions and may not apply to other areas. Use pesticides only according to the directions on the label. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Follow all directions, precautions and restrictions that are listed.