I thought I would do a follow up on El Primo. The plant flowered and produced a few olives the first year after being cloned. Unusual to say the least. The plant flowered and produced olives the second year. Also unusual. Now, the plant has flowered and has set olives this, the third year. What is unusual, is that the parent plant has never flowered or produced a single olive. It is the oldest and largest olive plant I have. The plants share identical genes and live side by side in the same media and conditions. I'll never understand plants.
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It's normally, really. In biology textbooks plant looks like a body, which consists of a root, stem, leaves, flowers and fruits (in most cases). The plant needs nutrients. Nutrient composition should vary depending on the stage of plant development.
This is true, but not all. Like any other living organism, the plant should interact with the outside world. It is involved in the energy exchange. In particular, the plant is well perceived threat. The threat makes the plant think about procreation in order to survive. I am sorry that some people are taking advantage of this.
For example, I know an old lady who had an old peony. Peony did not want to bloom a few years. Rather than divide the old bush, she took a knife and repeatedly struck root. Peony bloomed the next year like a man possessed. Also known practice, when the ax hit the fruit trees in the garden, if it does not give fruit. Tree perceives a threat and gives the fruit the following year. Or pineapple in the room. Florist pulls it out of the pot and hangs up the roots to stimulate flowering.
Perhaps, in your case the severed branch "remembered" that it could happen to her again at any time. Therefore, it blooms for to extend the genus faster. A relaxed for a long time, the mother plant has not flowers.
However, the plant receives not only a threat, but also love. I know many cases where plants died after his master's death. Although they continued to receive good care.