Tomato "Saint Pierre"

* All existing varieties and hybrids of tomatoes are divided into two large groups: indeterminate and determinate. They are pruned and grown differently. Every vegetable grower simply must know the features of their growth and training. 
Indeterminate hybrids are taller. They are characterized by: continuous shoot growth; the formation of the first inflorescence after the 8-11th leaf; the formation of subsequent inflorescences every three leaves, sometimes more, depending on growing conditions. 
Determinate hybrids are characterized by a lower height. They are characterized by: growth restriction (topping itself) after the formation of 4-6 or more inflorescences; the formation of the first inflorescence after the 6-8th leaf; subsequent inflorescences are formed every 1-2 leaves, or even follow one after another. 
Which hybrid should you prefer when buying seeds? 
This will depend on where, when, and under what conditions (in open ground, greenhouses, or tunnels) you are going to grow your tomatoes. 
In glazed heated greenhouses, whose height reaches two meters, of course, it is better to plant indeterminate hybrids. This is due to the longer growing period of plants in such greenhouses, since tall tomatoes use all of its large volume. The same applies to high film heated and unheated greenhouses. Indeterminate hybrids are easy to train. You just need to leave the main shoot and remove all lateral suckers, i.e., train the tomato plant to a single stem. With a 5-6 month growing period, indeterminate hybrids provide a more generous yield than tomato hybrids with limited growth. They are distinguished by stable fruiting; their fruits are very tasty and firm. Due to good foliage, indeterminate hybrids endure high summer temperatures more easily. Excellent results are shown by indeterminate hybrids F1 Pharaoh, F1 Eupator, F1 Funtik, F1 Vladimir, F1 Fatalist, F1 Bityug, F1 Fantomas, etc. 
Indeterminate hybrids may differ from each other in the vigor of growth processes, stem height, fruit weight and color, and the transportability of the fruits. In industrial greenhouses, with a 9-10 month growing period and automatic microclimate control, their yield can reach 200 kg (!) per plant. In the conditions of a summer cottage plot, the possible yield of indeterminate tomato hybrids is 3-5 kg per bush and more.
But remember that due to dense foliage, these hybrids are more susceptible to gray mold disease, especially if the greenhouse is poorly ventilated. 
Tomato hybrids with a determinate growth habit are divided into three groups: super-determinate, determinate, and semi-determinate.
Super-determinate hybrids: F1 Druzhok, F1 Leopold, F1 Biathlon, F1 Semko-Sindbad, varieties Alaska, Betta, Boni-M, etc., are characterized by early fruiting and simultaneous crop return. Plant height is 50-60 cm; they stop growing after the formation of 2-3 inflorescences. They are grown in open ground and under film tunnel shelters. Although the overall yield of such hybrids is low, due to early ripening they "escape" late blight infection, and due to dense planting, the yield per unit area increases. Their fruits are more often small rather than medium (up to 100-110 g), the taste qualities are average, but they are the very first among tomatoes and are good for whole-fruit canning. 
Determinate hybrids (the most numerous groups of determinate varieties): F1 Lya-lya-fa, F1 Master, F1 Blagovest, F1 Verlioka, F1 Gamayun, F1 Dotsent, etc., are distinguished by rather large fruits with good taste, a longer fruiting period, and greater yield. They are grown in film greenhouses but can also be grown in open ground. Their height reaches 1.0-1.5 m, the first inflorescence is formed under the 8-9th leaf, the plant stops growing after forming 5-6 or more inflorescences. When growing them, one should not forget to leave a reserve sucker to prolong growth. 
Semi-determinate hybrids: F1 Margarita, F1 Kostroma, F1 Laima, F1 Lezheboka, etc., are later-ripening than determinate ones. They stop growing after the formation of 8-10 inflorescences. Some plants, especially in a cloudy and rainy summer, may not stop growing at all and behave like indeterminate hybrids. 
Under no circumstances should you limit yourself to just one hybrid. But, to guarantee a good harvest, it is worth planting 5-7 plants of early-ripening super-determinate hybrids in open ground, in tunnels, or using temporary shelters. In a greenhouse, you can grow 8-10 plants of determinate hybrids and 5-8 plants of semi-determinate and indeterminate hybrids. In addition, hybrids with different ripening periods will allow you to have ripe fruits from early July to late October - early November, and if you use hybrids with long-storing fruits, even significantly later.