Why is it customary to give an odd number of flowers?

According to Russian, French and, for example, Armenian traditions, an even number of flowers are brought to funerals, and it is appropriate for a living person to give flowers only in odd quantities.
In almost all of Europe, the United States and some countries of the East, everything is exactly the opposite, they give an even number of flowers, because it brings happiness.

Israelis give only an even number of flowers, but they do not bring flowers to funerals. In Georgia, they believe that everything related to family values brings happiness, so two flowers (a pair) are a good combination, and an odd number of flowers are carried to the cemetery "so that the deceased does not take the couple with him."

The roots of these traditions and prejudices are to be found in the pre-Christian world.
Each country (region) has passed its own path of development and therefore such discrepancies and contradictions often arise.

Pagan beliefs interpret even numbers as symbols of death and evil. Do you remember the saying "trouble does not come alone"?
In many ancient cultures, paired numbers were associated with completeness, completion, in this case, the path of life.
An odd number, on the contrary, is a symbol of happiness, success, and luck.
Odd numbers are unstable, they symbolize movement, life, development.
Even is a symbol of peace and tranquility.

For the ancient Pythagoreans, odd numbers were the personification of goodness, life, and light, and they also symbolized the right side (the side of luck). The unfortunate left side, and with it death, evil, and darkness, were symbolized by even numbers. Isn't this where the famous "get up on the left foot", symbolizing an unsuccessful start to the day, came from?

In ancient Russia, two flowers were laid to those who died in the war, defending the motherland: "one to the dead, the other to the god."
Now it is customary to lay an even number of flowers to all the dead.

A gift bouquet in modern Russia obeys a simple rule: "odd to a dozen", that is, the number of flowers matters if there are three, five, seven, nine or eleven of them. An even number of ten or fewer stems is usually brought as a sign of mourning to mourning ceremonies. If there are twelve or more flowers in the bouquet, their number does not carry any meaning.

In the language of signs, each number has its own meaning, and you can use this to give the bouquet the right meaning. So, if you give one flower, it means that the person to whom you give it is the only one for you. By giving three flowers, you can express your desire to go with your loved one to the end of the world. Well, five means: "I love you."

Few people know that seven flowers used to be given only on the day of engagement.

Well, or just
1 flower is a sign of attention
3 flowers are a sign of respect
5 flowers are a sign of recognition
7 flowers are a sign of adoration
9 flowers – "I am at your feet"...