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Relatively frost-resistant mandarin varieties( still a subtropical crop) withstand temperatures down to -7– -12 С.Further skeletal branches are damaged.
Therefore, the most northern edge of the range barely captures the southern edge of the territory of the former Soviet Union: the Black Sea coast, Azerbaijan, Georgia. But you can grow a tangerine tree from the stone at home. At the same time, it is not so important at what latitudes you live: a blizzard, if it rages outside the window, is not a hindrance.
In the photo there are tangerine trees growing in the garden and grown at home.
Planting material, planting
The mandarin purchased in the nursery or the store will soon delight you with tasty small fruits. Here are just hand-made tangerine tree will delight you much more. There are several ways to plant a plant that will bear fruit with good care.
Growing a tangerine tree from the stone
The most affordable way: no problem to remove the seed from the fruit. Germinates about a month, while the substrate should not dry out. At first it grows very slowly. Well germinate in a special gel.
It makes sense to first plant in a relatively small pot, if it develops well - transplanting is no longer a problem. Do not wait for exactly the same fruits as the original: this is only possible with vegetative propagation.
Growing from cuttings
Mandarin has a poor rooting rate. To enhance it, you can cover the top, for example, with a cut plastic bottle or glass jar. This will increase the humidity of the air next to the handle. Substrate should not dry out! It is convenient to process the cutting itself with hiberinin before planting; there is a stimulant in any garden store. 
Another small trick: cutting the cutting before planting must be updated under water. This pruning prevents airflow from blocking the conductive beams.
Grafting on other citrus
Most often, as a stock, they use orange seedlings. The inoculation is done by budding, the requirements are the same as for any garden trees. That is: during a light lag of bark from wood( usually in June);without touching the cambium with fingers( the smallest particles of fat from the fingers reduce the survival rate);with careful wrapping the site of vaccination with a strip of polyethylene - in order to avoid drying. In the spring and in the autumn impart in split.
Cambium( a thin strip of dividing cells between the bark and wood) Scion and Scion must be the same!
In the absence of a skill, you should first get a hand on any other culture or just branches. The operation requires thoroughness. Just information: when ideally made vaccination, the pear takes root on the willow, as in the saying. True, then dries up, so that the fruit does not wait.
When grafting or growing from a cutting, the varietal features are fully preserved: the properties of the mother plant are exactly the same as the home-grown tangerine tree. 
A tangerine tree differs little between leaving a home grafted on a stock and grown from a stone at home. The only difference is in the distance of shoots from the stock and protection at first from breaking off: during physical impact, it can break at the site of inoculation.
Taking care of mandarin at home
Following all the described recommendations, you will enjoy the beautiful view of your plant, its fragrant flowering and sweet fruits.
Fertilizer
It is clear that when growing in a container, all the substances needed by a plant come from a small amount of soil. There can not be enough of them, so you need regular feeding. The easiest solution of complex fertilizer. It is convenient to water with diluted 1:10 mullein. The larger the container size, the easier it is to ensure proper development: the greater the supply of nutrients in the soil.
If there is a lack of a specific element( signs of a shortage of various elements appear differently), this is exactly what should be added. In winter, during dormancy, we fertilize with half the norm or do not fertilize at all. Additionally, we fertilize in the summer while fruit is poured. Top dressing at this time increases the sugar content and reduces the bitterness of the fruit.
Rest period
Mandarin does not shed its leaves, they have been hanging on a tree for four years. Therefore, “peace” is not absolute: the tree seems to be dormant. But this period is important, in its absence there will be no fruits. Therefore, in winter you need to stand at a temperature of 8-12 ˚C and reduced watering. Often there are recommendations to illuminate at this time with special lamps. .. although the day is short in winter and even less gets into the apartment of light, with rest, its tangerine is enough. Excessive fussing around a bush usually does not justify itself.
Watering
The soil should not dry out, even at rest. But the stagnation of water is harmful to the roots. To get out of such a controversial situation, it is good to lay a layer of shards, gravel or other large materials when landing on the bottom of the container. It is then easier to keep the soil moist, but not too wet. Excess water flows down where it does not harm the roots. And yet it is, the soil does not dry out completely. It is better to water with separated water: there is no harmful temperature difference;chlorine is harmful to the plant.
Transplant
This is still a tree, starts to bear fruit only by 4-5 years and grows for many more years. Immediately you will not plant in a huge container - it looks stupid, it takes place disproportionately to the size of the sprout a lot. And with a lack of space for the growth of the roots they are not able to provide the plant. Therefore, it is necessary to replant many times, as soon as the roots are woven over a clod of earth. Work is carried out carefully, in order to avoid unnecessary injury and root breakage, it is worth watered abundantly before a transplant.
Lighting
Mandarin loves a lot of light, the easiest way is to place it near the south window - you don't have to light it up. If we take the bush to the garden for the summer, then in the first days only for a few hours. Or at first we put in the shadow, for example, under a large fruit tree. By the way, in the summer, in the heat, it is also worth pritenyat, at least in the hottest hours. And to reduce the evaporation of water from the container to put on the surface mulch.
Pollinating
With this, quite simply: not required. Self-fertile culture.
Care for tangerine trees at home gives joy to the touch of a small miracle. .. Greens and fruits, filling an apartment with a citrus aroma against the backdrop of bad weather outside the window pleases the soul and cheers the heart.
