What to Do If Your Orchid Won't Bloom? Cause Analysis and Solutions

There are many reasons why an orchid won't bloom, and orchid growers need to investigate and analyze them one by one. A normal mature orchid, as long as it has reached a connected plant of two or three shoots or more, can generally bloom if it is cultivated properly (a small number of single-shoot orchids can also bloom; this phenomenon is often seen in Cymbidium kanran, which has thick roots and narrow leaves).

1. The orchid plant is still small and does not yet possess the reproductive genes. Some young seedlings that have not yet formed pseudobulbs need two years of vegetative growth to form pseudobulbs, then sprout new shoots two or three more times; only when three generations of branches grow together is blooming possible.

2. Dividing and planting separately will destroy the orchid's habit of passing on reproductive genes through generations growing together, so orchids are best planted in clumps. Single planting means fewer leaves, less accumulation of organic matter, and no way for the reproductive genes to become active. Generally, without three pseudobulbs growing together as three generations under one roof, it is difficult to bloom.

3. Improper dry and wet conditions. Late spring, summer and autumn are the vegetative growth periods of orchids (but they need to be protected from plum rains and heavy rainstorms). If autumn is on the dry side, it will hinder vegetative growth. Winter is its dormant period, and it should be kept on the dry side; if it is too wet, the potting soil can easily freeze and expand, crushing the root mass, affecting the sprouting of new shoots in the following spring and summer, and even more affecting its normal reproductive growth.

4. Too little light means limited accumulation of organic matter, which cannot supply the needs of reproductive growth. Although orchids are shade-loving flowers, that does not mean they need no light at all; they only avoid strong direct light and long periods of light, and need diffused, scattered light (semi-shade). Plants growing in dark places often have dark green, luxuriant leaves but bloom with difficulty and less often, while plants grown in a south-facing spot and with semi-shade in midsummer, though their leaves may be slightly yellow-green, produce more flowers, and the flowers are pretty and fragrant.

There is also another situation in which the orchid itself has special reasons for not blooming, or in other words, a very small number of orchids do not much like to bloom. This phenomenon has appeared in various orchid species, and I have encountered it myself: a plain-bud Cymbidium ensifolium collected locally in 2004 has been cultivated in this garden for six or seven years and has grown to more than a dozen pots, yet to this day it has never been seen to bloom. This is probably the infertility phenomenon of plants (orchids)!