These fragrant and colorful drought-tolerant succulents require little water

 The factors that limit the growth of plumeria are cold, and small immature plants are much more sensitive than mature, established specimens. When cold nights are expected, small plants should be wrapped in canvas or decorated with Christmas lights to increase the warmth of the surroundings, but the duration of the cold is more important than the actual temperature. If the temperature drops to 32 degrees Celsius but  stays there for only a short time, plumeria can be burned by light frost. If you live in a cold climate, put the plumeria in a container and in the garage during the winter. Stop watering  until the temperature rises and you can get out again. 

 Many cacti have fragrant flowers that always bloom at night. Each one is referred to, here or there, as a “night-blooming cactus.” One cactus of this description is Hylocereus, known as pitaya, a dragon fruit-bearing cactus. The other fragrant night bloomers include orchid cactus (Epiphyllum hybrids), appropriate for outdoor planters and containers kept out of direct sun, as well as indoors when exposed to bright light, whose floppy stems are thoroughly nondescript, and hedgehog or Easter lily cactus (Echinops hybrids) that have thorny, classic cactus stems and an upright growth habit. On young plants, hedgehog cactus flowers are so large and prolific that they completely cover the stems. Both orchid and hedgehog cactus may be found with huge flowers that bloom in every color except blue. Last but not least, there is apple cactus (Cereus peruviana), the best-known night bloomer with its tall bluish-green stems and round pink or red fruit which are quite edible. All types of night-blooming cacti  are known to be pollinated by bats and moths. 

 When it comes to long-flowering succulents, three immediately come to mind. Crown-of-thorns (Euphorbia milii) has red, pink, yellow, or white bracts every  day of the year. The bracts are actually leaf-like structures, clearly visible in the associated poinsettia (Euphorbia pulcherrima), and surround the center of the yellow flower  known as  cyathium.  Euphorbia milii is only a few feet high, but Euphorbia splendens can reach as high as 6 feet. The most beautiful of the crowns of thorns is the Thai hybrid, which also grows. Those bracts are much more noticeable than  the wider range of species mentioned above. 

 The other two long-flowering succulents are the flowering Kalanchoe blossfeldiana and the pollen plant (Kalanchoe pumila). Kalanchoe florists can be found at the flower counters in supermarkets all year round. Flower colors are yellow, orange, blush, pink, red and purple. Flowers often have an uninteresting shape, but certain varieties of flowers are twice as large as small roses. In half a day or  less, the florist Kalanchoe blooms outdoors for six months at a time. For pollen plants, I saw that huge mass in the Getty Center Garden many years ago. Every time I visited her, her pink flowers were  brilliantly adorned with soft gray leaves in the background. Ammonia Gardening at 

 Paros

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