What is stratification?

A neighbor in the country grows apricots from the bones and says that it helps stratification. Could you write, what is it?
Stratification - One of the methods for preparing seeds of some plants to sowing. Nature itself suggested his man. Fallen in the fall of juicy fruits and trees seeds are forced to lie on the ground, losing cold autumn, winter and part of the spring. If they germinate, they will die from frost. Therefore, those who breed plants from seeds withstand their long time in the crude sand at a temperature of + 3-5.
Not all plants require stratification. Most of all fruit needed: apple tree, pear, quince, cherry; Decorative plants: Barbaris, Hawthorn, Rosehip; Conifers: spruce, cedar, fir, pine, etc.

Strangle term All plants are different. For sea buckthorn, for example, it is enough to 35-40 days, bone rocks (cherry, tern, etc.) require a long time - 150-180 days and more. Most conifers - up to 60 days.

Technique stratification simple. If the seeds are small, they will prevent them in a gauze bag, which is put on wet sand or moss sphagnum. From above, the bag with seeds is also closed with sand or moss. For this, a solid box, jars or a rig ..
With a large number of seeds, they are mixed with wet sand and pour into a spacious pot, container, etc. And in fact, and in another case, the dishes are placed in the refrigerator, setting a low positive temperature in it. Seeds are browsing, stirred and do not care.
Large seeds can be interfered with all winter in special trenches in containers or embankment. Trenches are covered for winter so that they do not freeze.

Instead of stratificationyou can use autumn sowing, but in this case you risk getting uneven seedlings.
Some seeds can fly in the ground all summer and to take only the next spring.
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