Why Doesn't My Hibiscus Bloom?

There are a number of factors that may stop your Hibiscus blooming. Simply these are: Lack of sun or heat, lack of water, lack of pure water, a lack of soil drainage, being given the wrong kind of food, being moved too often or being trimmed while in bloom. If none of these is the issue, then you may have a problem with the roots of the Hibiscus plant and it needs to be moved.

Firstly, Hibiscus plants require a great deal of heat to bloom. Many people make the mistake of thinking that because their plant is in direct sunlight it is getting enough heat. This is wrong, as it’s heat not sun that is important to the plant blooming. Hence, try raising it up on bricks if it is in a pot or at least make sure it is in the sunniest part of the garden, whether potted or not.

Hibiscus also need plenty of pure water, as water which is not pure causes fungus to grow and can prevent the plant blooming. In addition to this the Hibiscus plant also needs food with a high potassium level, so if you are giving it plant food it must have a high potassium content.

Another issue could be if you are moving the plant too often. Moving the plant can cause it to go into ‘shock’ and this can be another factor which prevents it from blooming, so try to move the plant as little as possible once you have initially planted it. As you will note, some of the advice above advises moving the plant, which can cause it to stop blooming, so to further avoid exacerbating the problem make sure you choose the correct location in the first place; meaning one with plenty of sunlight and good soil drainage. Trimming the leaves while in bloom could also prevent it from blooming, so avoid this if possible.

If none of the above seems to be the issue then it is advisable to ask a gardener about a new type of fertiliser or maybe there is a problem with the roots, in which case the plant will have to be moved.

Hibiscus need to be planted in full sun and plenty of water.  Also, make sure that there is good drainage.  Try not to transplant too often because that put the plant into shock and will cause it not to bloom.  Do not trim plants while they are in bloom.  If you are still having problems with it not blooming try a fertilizer that promotes blooms.  You can pick this up at your local nursery or Home Depot.

Apparently, most hibiscus only have a one-day flower bloom anyway, so could it be that the flower is opening and then dropping without you seeing it? Drainage is also a factor in premature bud drop, they do not like their roots waterlogged. Another cause of premature bud drop are animals and bugs - spray regularly.

Likely, your plant is suffering from pests, and it could be aphids, which are sucking and chewing insects.  Examine your plat for signs of pests and use mild detergent in water (dish soap works well) to thoroughly wash the leaves, stems, and buds.

I have a beautiful hibiscus, but it only gives me about 2 flowers at a time. It's in full sun and gets watered daily on the drip system. Why don't I have lots of flowers? The bush is extremely healthy.
Susan

I have a potted hibiscus that I put out in the summer and bring in the house in the winter. From last May when it was given to me, till late last fall it bloomed constantly. It quit during the winter so how can I get it to bloom this spring and summer - it has a lot of new green growth on it. Thanks

Take care of these things and it will bloom:
1.       It requires warm temperature, so put in suitable place
2.       Keep the roots flooded with water and give plenty of water
3.       Give pure water otherwise fungus can attack the plant
4.       Feed the plant regularly with high potassium food
5.       Soil draining is also required
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You might be over watering it, even if you don't think so. The roots are so moist that they can't get enough air. Just give it some space. I'm not saying throw it under the sun and let it burn but just give it a few days and it should start to bloom. If the rest of the plant is fine then you shouldn't have much to worry about. :)

Here's an entire page dedicate to helping take proper care of your hibiscus plant.

I had my hibiscus in a sunny south window all winter and it always had blooms on it. This spring I cut it back a bit because it was getting leggy. Now it's on our deck in a VERY sunny spot, but not blooming. It has many healthy shiny green leaves, but no blossoms. What should I do?