Tomato (Solanum lycopersicum L.) is an economically important vegetable crops in eastern North Carolina. The region’s warm temperatures, long growing season, and access to irrigation infrastructure create strong production potential. However, high humidity, intense rainfall events, elevated disease pressure, and increasing climate variability require well-adapted production practices. This publication summarizes key recommendations for successful fresh-market tomato production in eastern North Carolina, with emphasis on cultural practices, nutrient and water management, and pest and disease considerations.

Tomato production in Clinton, NC

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Tomato production in Clinton, NC

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There are many good tomato cultivars. The choice of cultivar is important to orderly production, earliness, shipping quality, and disease resistance. Here are some cultivar suggestions which do well in eastern North Carolina, in no particular order. For more information and cultivar suggestions, please visit the 2025 Southeastern Vegetable Crop Handbook or check with your county extension agent for the latest recommendations.

• Amelia possesses resistance to Tomato spotted wilt virus (TSWV), Fusarium wilt races 0, 1, 2, and 3 (F), root-knot nematodes (N), gray leaf spot (SL, SBL, SS), and Verticillium wilt (V).
• BHN 602 exhibits resistance to Tomato spotted wilt virus (TSWV), tolerance to high-temperature conditions (heat set), tolerance or resistance to Alternaria stem canker (ASC), Fusarium wilt races 1 and 2 (F), and gray leaf spot (SL, SBL, SS).
• Celebrity has resistance or tolerance to Fusarium wilt race 1 (F), root-knot nematodes (N), and Verticillium wilt (V).
• Defiant PhR exhibits tolerance or resistance to Fusarium wilt races 1 and 2 (F), Verticillium wilt (V), early blight, and late blight.
• Florida 47R exhibits tolerance or resistance to Alternaria stem canker (ASC), Fusarium wilt races 1 and 2 (F), gray leaf spot (SL, SBL, SS), and Verticillium wilt (V).
• Jolene exhibits tolerance or resistance to Fusarium wilt races 1 and 2 (F), Fusarium crown and root rot (FCRR), Verticillium wilt (V), and Tomato yellow leaf curl virus (TYLCV).

Tomatoes perform best in well-drained, medium-textured soils that balance water-holding capacity with adequate aeration. Ideal soils are typically sandy loams or loams with good internal drainage, moderate organic matter, and minimal compaction. These soils allow for rapid root development, efficient nutrient uptake, and reduced risk of root diseases. Tomatoes are particularly sensitive to poor aeration; prolonged saturation restricts oxygen availability to roots and increases the incidence of diseases such as Pythium and Phytophthora. Optimal soil pH for tomato production ranges from 6.0 to 6.5, which maximizes nutrient availability and microbial activity.

In eastern North Carolina, soils are predominantly sandy loams, loamy sands, and sands. These soils warm quickly in spring and are well suited for early planting, but they are often low in organic matter and cation exchange capacity, making them prone to nutrient leaching under high rainfall or excessive irrigation. Additionally, shallow water tables and stratified soil profiles can result in temporary saturation following intense rainfall events, even in soils that appear well drained at the surface.

To optimize tomato production in eastern North Carolina soils, growers typically rely on raised beds (8 to 12 inches height), plastic mulch (white or reflective), and drip irrigation to improve drainage, regulate soil temperature, and precisely manage water and nutrients. Split fertilizer applications (at least weekly) through fertigation are particularly important in sandy Coastal Plain soils to reduce nitrogen losses and maintain consistent nutrient availability throughout the season. When properly managed, the soils of eastern North Carolina are highly productive for tomatoes and can support high yields and excellent fruit quality.

4 weeks old tomato plants in Clinton, NC

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4 weeks old tomato plants in Clinton, NC

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Pre-plant fertilization, liming, and in-season fertigation programs for tomato should be based on soil test results. Soil testing provides the most reliable guidance for nutrient rates and helps reduce excessive fertilizer applications, particularly in sandy Coastal Plain soils.

In the absence of a soil test, soil pH should be adjusted to 6.0–6.5, and sufficient pre-plant fertilizer should be applied to supply 50 lb/acre of nitrogen (N), 50 lb/acre of potassium (K₂O), and 125 lb/acre of phosphorus (P₂O₅). All fertilizer materials and lime should be thoroughly incorporated into the soil prior to bed formation to ensure uniform nutrient distribution within the root zone.

On soils testing low to low–medium in boron, apply 0.5 lb/acre of actual boron as part of the pre-plant fertilizer program. Care should be taken to avoid excessive boron applications, as the margin between deficiency and toxicity is narrow.

Drip fertigation is the preferred method of nutrient delivery for tomatoes in eastern North Carolina, particularly on sandy soils prone to nutrient leaching. Soluble fertilizer applications should begin within one week after transplanting and continue through the final harvest.

The fertigation schedules presented below provide general guidance for tomato production under low and high soil potassium conditions. Application timing is based on relative crop growth and nutrient demand, and adjustments may be required depending on planting date, cultivar, weather conditions, and overall crop vigor.

Regular leaf tissue analysis is strongly recommended to fine-tune fertigation timing and nutrient rates, ensuring that fertilizer applications align with crop demand and minimizing nutrient losses.

Suggested Fertigation Schedule for Tomato - original recomendation from 2025 Southeastern Vegetable Crop Handbook

Low Soil Potassium

Suggested Fertigation Schedule for Tomato

High Soil Potassium

Rates should be adjusted based on tissue analysis and crop performance.

Plant spacing and density play a critical role in determining tomato yield, fruit quality, and disease pressure. In eastern North Carolina, where high humidity and frequent rainfall are common, adequate spacing is essential to promote air movement within the canopy and reduce foliar disease incidence. Fresh-market tomatoes are typically spaced 18 to 24 inches between plants within the row, with 5 to 6 feet between rows or bed centers, resulting in plant populations ranging from approximately 3,600 to 5,800 plants per acre. Higher plant densities may increase early yield but can also promote excessive vegetative growth, limit spray penetration, and increase disease pressure. Spacing should be adjusted based on cultivar vigor, staking or trellising system, and overall management intensity to achieve an optimal balance between yield and plant health.

Plastic mulch is a standard practice in summer tomato production in eastern North Carolina and plays a key role in weed suppression, soil moisture conservation, and temperature regulation. Black plastic mulch is commonly used for very early plantings, although it could be risky is temperatures sudently increase, while white or reflective mulches may be beneficial for summer by reducing soil temperature and mitigating heat stress. Effective weed control relies on the combined use of plastic mulch, pre-plant herbicides, and timely cultivation of row middles, as weeds emerging in non-mulched areas can compete for water and nutrients and interfere with harvest operations. In fields with a history of soilborne diseases, nematodes, or persistent weed pressure, soil fumigation may be considered as part of an integrated management strategy. Fumigant options vary in spectrum and regulatory requirements, and their use should be guided by field history, target pests, and current label restrictions. Proper application timing, soil preparation, and adherence to safety and buffer requirements are essential to maximize fumigation efficacy and protect applicators and nearby communities.

Tomato plants should be staked or trellised to improve fruit quality, facilitate harvest, and reduce disease pressure by keeping foliage and fruit off the soil surface. In the stake-and-weave system commonly used in eastern North Carolina, a wood or fiberglass stake is placed at each plant, with the stake driven firmly into the soil to ensure stability. Stakes should be tall enough to leave at least 4 feet above the soil surface, allowing adequate vertical support as plants grow. Plastic twine is used to support the plants by running it along both sides of the row, weaving it around each stake to create a continuous support system. Twine applications should begin when plants are 10 to 12 inches tall and repeated at regular intervals as the crop develops to maintain upright growth and prevent lodging. Proper staking and timely twine placement improve air circulation within the canopy, enhance spray coverage, and contribute to more uniform fruit development and harvest efficiency.

Efficient irrigation management is critical for tomato production in eastern North Carolina, where sandy soils and high evaporative demand increase the risk of both water stress and nutrient leaching. Drip irrigation is the preferred system for tomatoes and should be managed to maintain soil moisture within the active root zone while avoiding prolonged saturation. The use of soil moisture sensors provides an effective tool to improve irrigation scheduling by offering real-time information on soil water status. Sensors such as granular matrix sensors or capacitance probes can be installed at multiple depths to track water movement and root uptake, allowing growers to adjust irrigation frequency and duration based on crop demand rather than fixed schedules. When combined with crop growth stage and weather conditions, soil moisture–based irrigation management can reduce water use, improve nutrient use efficiency, and minimize yield losses associated with both drought stress and over-irrigation.

Soil moisture sensors that report data as volumetric water content (VWC) express the percentage of the soil volume that is occupied by water. For example, a VWC value of 10% indicates that 10 percent of the total soil volume is water and the remaining 90 percent is air and solid particles. Interpreting VWC values requires an understanding of soil texture, because sandy soils hold less water at field capacity and reach water stress at much lower VWC values than finer-textured soils.

In sandy soils typical of eastern North Carolina, field capacity generally ranges from approximately 8 to 12% volumetric water content (VWC), while permanent wilting point is near 4 to 6% VWC. As a result, total plant-available water is limited, often on the order of 4 to 6 percentage points of VWC. To avoid exceeding 50% depletion of available water, consistent with FAO irrigation guidelines for tomato, irrigation should typically be initiated when VWC declines to approximately 6.5 to 8% at the effective rooting depth. The exact threshold depends on the specific soil texture, rooting depth, sensor placement, and prevailing evaporative demand.

For example, if a sensor installed at an 8-inch depth shows VWC declining from 11% to 7% over several days, this indicates active crop water uptake and that soil moisture is nearing the lower limit of readily available water. Irrigation should be initiated at this point to prevent crop stress. Following irrigation, an effective event is characterized by a rapid increase in VWC (e.g., from 7% back to 10–11%), followed by a gradual decline as roots extract water. In contrast, a sharp rise in VWC that remains elevated for extended periods suggests excessive irrigation or restricted drainage, increasing the risk of nutrient leaching and root disease.

Using multiple sensors at different depths improves interpretation by showing whether irrigation water is being retained within the root zone or moving below it. When VWC increases at deeper depths shortly after irrigation, this indicates deep percolation and potential nutrient losses. Over time, growers can use these sensor trends to fine-tune irrigation duration and frequency, aligning water applications more closely with crop demand and improving overall irrigation efficiency.

For shipping to distant markets, harvest fruits in either the mature green or breaker stage. For local markets, fruit should be allowed to develop more color. Package in the size container your market wants. Usually this is a 20-, 25- or 30-lb cardboard carton. Pack to assure uniform size, color, and quality.

When tomatoes are produced following the practices outlined in this publication and major production constraints are avoided, yields of 20 tons per acre or greater can be expected. Inadequate implementation of recommended practices can substantially reduce yield potential. Under well-managed systems, experienced growers may exceed 30 tons per acre, reflecting the strong relationship between management intensity and crop performance.

1. Select adapted cultivars with resistance to common diseases such as Tomato spotted wilt virus, Fusarium wilt, and Verticillium wilt.

2. Choose well-drained fields and use raised beds to reduce waterlogging and root disease risk.

3. Test soils before planting and adjust pH to 6.0–6.5 to optimize nutrient availability.

4. Use plastic mulch and drip irrigation to improve water use efficiency, suppress weeds, and reduce foliar disease pressure.

5. Manage irrigation based on crop demand, using soil moisture sensors or evapotranspiration estimates rather than fixed schedules.

6. Apply nitrogen and potassium through split fertigation to match nutrient supply with plant uptake and minimize leaching losses.

7. Stake or trellis plants early and maintain support to improve air circulation, spray coverage, and fruit quality.

8. Maintain appropriate plant spacing to balance yield potential with disease management, especially in humid environments.

9. Scout fields regularly to detect insects, diseases, and nutrient disorders before they reduce yield or fruit quality.

10. Harvest at the proper maturity stage and handle fruit carefully to preserve quality and maximize market value.