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Maybe that is the reason, I found this article, I hope it helps: 

Plumeria Does Not Bloom: Why Is My Frangipani Not Flowering

By Bonnie L. Grant

Frangipani, or Plumeria, are tropical beauties that most of us can only grow as houseplants. Their lovely flowers and fragrance evoke a sunny island with those fun umbrella drinks. Many of us northern gardeners wonder why is my Frangipani not flowering. Generally, Frangipani will not flower if they receive less than 6 hours of bright sunlight, which can be hard to achieve in some climates or where there are lots of trees. There are a few cultural and situational steps you can take, however, if your Plumeria does not bloom. Why is My Frangipani Not Flowering? Frangipani flowers come in a colorful array of tones. The bright hues of these 5-petaled beauties are standouts as container plants in cooler climes or as garden specimens in warm climates. The foliage is glossy and nice to look at, but since most gardeners grow the plants for their profuse blooms, a non-blooming Frangipani is something of a disappointment.

There are 3 main reasons for a Frangipani not blooming. In addition to the 6 hours of bright light the plants require, they also need fertilizer at the right time and pruning occasionally. Pest can also attribute to non-blooming in plants. If the fertilizer is not the right type and is not applied at the right time, it can affect blooming. Fertilize Plumeria plants during the spring and summer. Another reason a Frangipani will not flower is that the stems are not old enough. Young plants, or those that have been pruned, need at least 2 years before the wood is ready to produce buds and flower. Insects such as thrips, aphids and mealybugs will threaten overall vigor but can also cause withering and dropping of new buds, another possible cause when a Plumeria does not bloom.

How to Reduce Chances of Non-Blooming Frangipani

Frangipani are not cold tolerant and grow best in warm regions of the world. Cool season gardeners can put container plants outdoors in summer but they need to go indoors when cold weather threatens. Plumeria plants are hardy to 33 degrees Fahrenheit (.5 C.). Plant in-ground trees in a site with full to partial sun, but at least 6 hours of light per day. Extreme sites, such as the southern side of the house, should be avoided. Potted plants should be in good potting soil with excellent drainage. In-ground plants need soil amended with compost and good drainage. Water the equivalent of one inch per week. If you are rooting a cutting, you should wait to fertilize until the cutting has new leaves. Mature Frangipani should not be watered or fertilized in winter. In spring, use a water soluble fertilizer with phosphorus content of 50 or higher twice per week. A granular fertilizer should have a phosphorus rate of 20 or higher. Time release formulations work well for consistent fertilizing through summer. A balanced time release fertilizer works well for overall plant health, but one higher in phosphorus can help promote flowering. Prune these plants in winter, but again, this is one of the reasons for Frangipani not flowering, at least for a couple of years.

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@Sonita  Thanks  for  your  wonderful  report !   Yes,  the  smell  is  really  stunning,  staggering :x  Maybe  I  must  move  to  the  Maldives  or  Nicaragua ?  I  miss  that  smell  alot :)  Similar  good  like  roses,  but  different,  hahaha  -  I  will  post  a  Frangipani...  it  was  my  first  pic  when  I  came  online !


BEAUTIFUL  -  IN  MANY  COLORS...  BUT  I  MEAN  THIS  ONE :x  I  WOULD  GIVE  ALOT  FOR  SMELLLING  IT...  hahaha    Maybe  I  must  look  in  my  town......

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