Lack of flowering.
Reasons for lack of flowering in plants.
Cleve is not considered a demanding plant, however, it blooms only in the cramped pot, after a short period of rest in prohladnogm room. Not all indoor plants bloom in the home. Some do not flower or in a greenhouse or a greenhouse, either at home, while others may bloom only in the hothouse environment, as close to natural, but there are a large group of plants flowering in the indoor environment. Among them are demanding and not even completely unpretentious that even when they forget to care for, not only grow but flourish (which, for example, some species of cacti, pelargonium, etc.). Try to consider the most likely reasons for plants not in bloom, bearing in mind that they should bloom in room conditions.
First and foremost is the lack of lighting, but not necessarily direct sunlight (not all the plants endure them), and bright ambient light. Virtually all flowering plants need good light, not many plants in bloom in the northern windows, and even more so in the dark room. But many plants bloom well under artificial light, especially fluorescent lighting. Even if absolutely no natural light, but well organized artificial light, plants will grow, and may well flourish. Therefore, if the plant does not bloom, it is first and foremost must consider whether it is sufficient light. It should also take into account the length of daylight hours, usually at least 10-12 hours.
Incorrectly selected soil mix - for some reason it received very little attention, and rarely check the soil pH before applying it. When in fact, not uncommon when purchased soil mixtures pH is far from what point to the package. Most plants prefer soil with sub-acidic pH 5,5 - 6,5 (it's asparagus, amaryllis, begonias, primrose, calceolaria, pelargonium, tradescantia, etc.). Some plants prefer acidic soil with pH 4,5 - 5,5 (azaleas, hydrangeas, gardenias, calla, camellias, fuchsia, anthurium, etc.), some plants that like soil with a neutral reaction pH 6,5 - 7 , 5 (roses, chrysanthemums, cineraria). Many of the above plants will not bloom if you plant them in soil with inadequate acidity, or flowering will be sluggish. Therefore, if your plant enough light, deal with the soil - whether it's good enough for your plants.
Incorrect transplant - one of the main reasons for the lack of flowering houseplants. In this case, violations can be many: too large or too tight container (eg, Cleve blooms well when the pot is tight fit), root damage, even minor or quite subtle, especially in plants that reproduce only by dividing the bush (for example, spatifillyum, Nephrolepis and etc.) may lead to the fact that even a fairly undemanding plant long blooming. Transplant in not a good time of year, for example, in the autumn or winter, is fraught with even the death of the plant. Eating disorders plants - not only when the plant is starving, if not transplanted a few years and not fed (perhaps put in a not very fertile soil), but when the plant is fed too much fertilizer, especially if they are not properly selected and contain lots of nitrogen (say in such cases - a plant "zhiruet, characterized by, for example, klerodendrona).
Violation or the absence of a dormant period - not all plants, but many, to winter or spring bloom need a period of rest, consists in the maintenance of relatively cool conditions and a very limited (sometimes almost dry content). Illumination depends on the plants - some go through a period of rest in a shaded place, others are quite bright. Normally, recommendations for the care they say, whether a plant needs a mandatory rest period or not (see encyclopedia).
Too dry air - can also cause lack of blooms for indoor plants. Please note that if the apartment high temperature - above 22 В° C, then the periodic spraying is only temporary refreshing plant, and this is not enough. Therefore, if the plant needs very humid air, such as orchids, the pot with the plant will put on a tray with water (wet pebbles), and possibly also sprayed.
Pests - oddly enough, but it's not the most common cause of "non-flowering plants, but still in very severe cases, such as thrips or whitefly plant not only grows and develops poorly, but not tying buds. If the pest is not much time to spread to the plant, it may flower, but then begins to lose and buds and flowers. There are other (though not as frequent) reasons why the plant does not bloom. This may not be correct crop, for example, a Hoya is not cut off the faded flower stalks, or breach of irrigation (eg, strong peresushka or watering chlorinated or hard water), etc.
There are occasions when the room conditions blossomed such plants, which bloom very rarely or not at all in bloom. And it usually happens as if by accident, the owners often do not even understand what is so special they did, that the plant was so pleased with them, such as aloe, not without reason called the century plant (supposedly it blooms once every hundred years), but some of it good blooms.
It often happens that the recommendations for the care of plants, says that it must be transplanted within two - three years, but it turns out that the first year the plant flowers, and the next year, no blooms. Often the reason for this is not the tightness of the pot or nutritional deficiencies, and alkalization of soils. That is, for the year it gradually deposited salts, pH rises and the plant refused to bloom and even starts to hurt. Therefore does not interfere with test soil acidity, if the plant is still too early to transplant, and if necessary it was acidified (to do it watered with a weak solution of citric acid or replace the top layer of earth at the old pine needles or peat).
Feeding flowering plants need to choose the right fertilizer. This is usually potassium - phosphate fertilizer, they do not contain very much nitrogen. It may be useful for example Uniflor-color, Omu-Tsvetik etc. How to determine the exact cause of all these? Perhaps the reason and not one. Can proceed by process of elimination - knowing what conditions are needed by your plants, think about what care might not like him so that it does not want to bloom. Not necessarily, that some infringement of care, such as the impact on the whole plant. If lack of light is strong, then the plants can grow shallow leaves and stems elongate, but maybe light enough for normal growth, but not enough to bloom. The same applies to lack of nutrients in the soil and air humidity. Therefore, we first need to check the most fundamental aspects - the light, humidity, temperature, and then does not interfere to check the acidity of the soil and filled the pot roots, as well as the presence of pests.
It's one thing when the plant does not bloom at all, and quite another when in bloom poorly or simply losing buds and flowers. In the first case, usually only deal in the above mentioned reasons. But in the second case, the cause may be the same success with the most different - excessive or insufficient watering, watering with cold water, fluctuations in temperature, draft, moving plants to a new place, wrong change, excess fertilizer, pest attack or disease damage, etc.