San Marzano tomatoes are clearly distinguishable from other types of tomatoes due to their elongated shape and pointy ends, both of which are native to Italy and they are very suitable for making pate with a fair wholesale price. Because they are fleshier and contain fewer seeds than other types of tomatoes, these tomatoes are also referred to as "San Marzano sauce tomatoes." This old-fashioned tomato has a flavor that is robust and sweet, and it has less acidity than other tomatoes. Many gardeners enjoy eating this tomato as a snack. The fruits develop in clusters of six to eight, with each measuring approximately four inches in length. Purchase a plant from one of the nearby garden centers. Or, if you want to start seedlings, you should sow the seeds about 8 weeks before the date of the last frost and a little earlier than you would for other types of tomatoes. This is because San Marzano tomatoes need about up to 85 days to mature on their vines, which can reach heights of up to 8 feet. Other types of tomatoes mature in about 70 days. The San Marzano Tomato: How to Plant It When the seedlings have reached a height of between 6 and 12 inches, transplant them. Place them in a hole that is twice as broad as the plant but the same height as the plant itself. At least two-thirds of the seedling's stem should be buried after it has been set underground. 
Dig a hole in the ground and bury the plant at an angle, keeping the crown of the plant above the surface of the dirt. This will encourage better growth. After that, backfill the space with earth. Press the earth down firmly. Water well. Plants should be spaced between 30 and 48 inches apart. As the height of each plant increases, connect the branches together using twine or pantyhose strips. San Marzano Plant Care To provide your plants with additional support, position them in close proximity to a wall or fence, or provide them with a stake or sturdy cage. It is preferable to get this done as soon as possible rather than later, when the roots are still relatively little. In such case, you might have to slide it over the tomato plant, which would disrupt the plant's ability to produce new leaves. Because the majority of San Marzano tomatoes are indeterminate and will grow to be quite large, the typical tomato cages may not be large enough or provide sufficient support for the plants. If you do decide to use a tomato cage, get one that is particularly high and constructed of strong gauge wire so that it can handle the huge harvest that the plant will produce. Light San Marzanos prefer full sun, like other tomato plants. Plant them in a spot that is exposed to sunshine for a minimum of six to eight hours each day. Soil Mix together one half standard top soil and one half organic matter such as peat moss, manure, or compost to form a soil that is ideal for growing San Marzano tomato plants. Alternatively, mix together one third organic matter and two thirds good quality organic soil. 
You can also use 1 to 2 cups of garden lime for every container that holds 10 gallons. It is ideal to keep the pH of the soil between 5.8 and 7. If it is necessary, the pH level can be adjusted by adding wood ash or additional agricultural lime, or it can be lowered by adding organic matter. Water Tomato plants want soil that is somewhat damp all the time. Make sure the dirt doesn't get entirely dried out. Compost tea may be used to irrigate the plants (made by letting compost or manure sit in water for a while before mixing it). When properly watering plants, you can also use water from ponds and wells, as well as rainwater. Fertilizer Within the first two weeks after planting, use a fertilizer with the ratio of 10-10-10, which is low in nitrogen. This will nourish the foliage just enough to maintain the plant healthy and direct the plant's energy into producing fruit. In order to prevent the fertilizer from burning any leaves that are close to the ground, it should be applied in trenches that are at least 6 inches away from the plant's steps. When growing tomatoes in containers, use a fertilizer that is water-soluble. Temperature as well as Relative Humidity Tomatoes with the San Marzano variety should be grown in the open air at temperatures ranging from 50 to 95 degrees Fahrenheit and in soil with a temperature of at least 60 degrees. 
It is important not to transplant seedlings or young plants into soil that is too chilly since the transplant shock could limit the plants' growth. San Marzano Tomato Varieties and Their Uses There are many different varieties of San Marzano plants available, ranging from the traditional heirloom plant to hybrids of the species. Heirloom 'San Marzano' are often named 'San Marzano 2' or 'San Marzano 3.' These are the plants that produce the classic fruits, which are elongated and have thick walls and very few seeds. One hybrid that was produced in the United States is known as the "San Marzano 15 F1 Hybrid." It produces tomatoes with a larger pear shape that ripen a little bit earlier in the season. The 'San Marzano Lungo F1 Hybrid' tomato variety was created in Italy with the goals of producing a high yield and being resistant to cracking in wet conditions. After around 90 days from the time of planting, the 'San Marzano Gigante 3' tomato plant bears larger fruits of approximately 2 and a half inches in diameter. In addition, the 'San Marzano Scatalone' variety bears fruit later in the season and has a more pear-like shape to its tomatoes. 
One such variety is called "San Marzano Lampadina," and it is fairly unusual as well as quite strong. It produces tomatoes in the shape of elongated pears that have fleshy walls and hollow seed chambers. How to Germinate and Germinate San Marzano Tomato Seeds When planting seeds, select a potting soil that is rich in nutrients. First, fill a bucket with the soil, then wet the soil gradually while stirring in the water. The soil should be allowed to become damp, but not waterlogged. Spread the dirt out across the seedling trays and pack it down with your fingertips before filling the trays to within a quarter of an inch of their utmost capacity. Plant a single seed on the very top of each cell. After that, lightly cover the seeds with a little bit more of the soil. To maintain a moist surface on the soil, spray some water from a spray bottle onto it. 
This top layer of moisture will keep the humidity levels at an increased level, while the seed will be encouraged to sprout from the bottom inches of soil that are already moist. In addition, a high degree of humidity can be maintained by covering the trays with plastic wrap, making use of a heating mat, and positioning a tray underneath it, which should be periodically refilled with water. Plant seeds in an area that receives direct sunshine, preferably near a window that faces south, or beneath a grow light. Keep the temperature between 70 and 80 degrees Fahrenheit and check on the amount of moisture that has evaporated each day. When a full set of "true leaves" has developed on the seedling, it will be time to move it into a container that is four inches in diameter. Put soil in about a third of the container. The seedling should be covered with soil to a depth of half an inch below the rim of the container before proceeding. 
Press your fingers into the soil to compact it. When the top inch of the soil is dry, the seedlings need to be watered so that they can continue to grow. The term "hardening off" refers to the process of preparing plants to move from the interior to the outdoors. This can probably be done around April or the beginning of May, but it really depends on the frost dates in your location. Start transitioning seedlings when the weather is sunny and there is a light wind. Place plants outside for a stretch of time during the hottest part of the day to maximize their exposure to the sun. Take precautions to prevent them from catching fire or being damaged. If the stems need to be made stronger so that they can survive the wind, you should place them in front of a fan inside for approximately one hour every day.
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