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‘Karpooravalli’ Banana

‘Karpooravalli’ is a relatively undemanding cultivar.

‘Cavendish’ and its variants have always been the most familiar types of banana locally. They are the most popular that are available from produce markets. From nurseries, they remain the most commonly available cultivars. A few other options are only beginning to become available. A few of these could be more reliably productive within local climates.

‘Karpooravalli’ has been available here for quite a while, but remains uncommon. Those who are familiar with it often describe it as wanting ‘only sunshine and water.’ It tolerates soil of inferior quality better than other cultivars, and craves less fertilizer. Within rich soil, it may crave none. It should likely stay away from fences that its pups could sneak under.

‘Karpooravalli’ is supposedly the sweetest of the Indian bananas. Although its fruit is a bit shorter than more familiar bananas, it is often a bit plumper. Ripe fruit is yellow with pale green blush, and delightfully aromatic. Foliage is more resilient to wind than that of most other cultivars. It can stand more than fifteen feet tall on its very vigorous pseudostems.

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Banana Trees Actually Produce Bananas

Banana trees provide boldly lush foliage.

Banana trees, much like palms, arboriform yuccas and cordylines, are herbaceous trees. They develop no secondary xylem, or wood. What seems to be trunks are pseudostems, which are just leaves in very tight bundles. These pseudostems grow from subterranean corms, which can grow rather big. Each pseudostem is monocarpic, so dies after bloom.

Although they are very easy to grow, banana trees are not very popular. They can be too easy to grow, and become overwhelming. In some climates, frost can ruin their foliage for part of the year. In some exposures, their foliage can get shabby from wind. Some expect generous and frequent applications of fertilizer. All want generous and frequent irrigation.

These characteristics are contrary to growing banana trees merely for appealing foliage. Realistically, that is what most are for. Those of the Ensente genus are fortunately easier to maintain, but fruitless. Their lushly huge leaves are spectacular, relatively durable and generate much less debris. However, after a few years, they die without generating pups.

Banana trees of the Musa genus generate fruit, although some are primarily ornamental. A few produce delightfully colorful fruit that is too small, seedy or starchy to be palatable. Musa are more pervasive although less popular than Ensente. While Ensente come and go, Musa are reliably perennial. Several produce enough pups to potentially be invasive.

Musa, unlike Ensente, therefore develops colonies of a few to many pseudostem trunks. A few new trunks can replace each old trunk faster than they can deteriorate after bloom. Removal of deteriorating old trunks promotes growth and fruiting of new trunks. So does culling of congested new trunks. They propagate very easily by division with intact roots.

Because banana trees are tropical, they are unfamiliar with the seasons here. They grow fast with warmth but very slowly without it. They bloom randomly though. Flowers that try to bloom during autumn may stagnate long enough to rot through winter. Late fruit can do the same. Fruit that begins to develop early is much more likely to finish prior to autumn. Some cultivars develop faster.

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Tropical Hibiscus

Hibiscus floral structure is notably unusual.

Hummingbirds and butterflies are quite fond of tropical hibiscus, Hibiscus rosa-sinensis. They are attracted to the bright yellow, orange, red, pink or white color of its bloom. They stay for the syrupy nectar that they find deep within the flowers. Tropical hibiscus attracts pollinators rather efficiently, but almost never generates seed. Most cultivars are hybrids.

Tropical hibiscus flowers are not overly profuse, but are about three or four inches broad. Fancy hybrids that bloom with broader flowers are not as vigorous as more typical sorts. Most cultivars bloom with somewhat ruffled single flowers. Some bloom with more ruffled double flowers. Both types of flowers have five garishly flaring petals. None are fragrant.

Tropical hibiscus grows as evergreen shrubbery about six to a bit more than ten feet tall. Pruning to remove congestion of inner growth promotes healthier outer growth. Besides, whitefly and scale insects often proliferate on crowded foliage. Leaves are mostly two to five inches long and two to three inches wide. Bloom continues from summer to autumn, mostly with warmth.

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Raising Cane

Sugarcane has been disturbingly easy to grow. This pair of pictures were taken about a day apart. The picture with smaller growth was taken yesterday morning, and posted with my Six on Saturday post at midnight. The picture with larger growth was taken this morning. If sugarcane grows this fast as a rooting cutting during winter, what will it do in the landscapes? Will it become an invasive weed? I suppose that I should be pleased with such healthy growth, but I am also concerned.

This particular sugarcane is likely ‘Pele’s Smoke’, which is more of an ornamental cultivar that should stay relatively compact. The original specimen from which I got the cuttings was not much more than six feet tall after at least two years, with bronzed foliage that is about the color of smoky topaz. It lives in Brent’s front garden. I pruned and groomed it while I was there for the first few days of November. Of course, I could not merely discard the scraps. I brought them back here and processed them into cuttings. I hoped that a few might take root.

The problem now is that most of the cuttings are beginning to grow. Only the softest of the terminal cuttings did not survive. Sugarcane is a tropical grass, so should not be growing much at all while the weather is cool. The many cuttings are stuffed into a pair of #5 cans, so may need to be separated prior to spring. I thought that only a few would survive at this time of year, and that they would grow too slowly to need separation until late next winter. Of course, I can not discard any surplus as I should. Only a few will go into the landscapes. Perhaps I can share some with neighbors.

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flowering maple

Flowering maple should finish bloom soon.

The identities of the many different garden varieties are vague. Most are likely hybrids. A few might be simple species. Some that seem to be hybrids are really cultivars of simple species. Regardless, most flowering maples collectively qualify as Abutilon X hybridum. If all were hybrids, as their name implies, none would generate viable seed, as some do.

Flowering maple can grow somewhat fast, but tends to be lanky if it does so. It should be a bit fuller with slower growth or minor tip pruning. Several cultivars grow no higher than doorknobs, but others reach first floor eaves. Flowering maple demands regular watering and rich soil. It enjoys humid warmth, but may roast in arid heat with harsh sun exposure.

Bloom is sporadic from late spring until frost. The flowers resemble those of hibiscus, but are no more than three inches broad. Most are pastel tints of yellow, orange or pink, with prominently richer veining. Some are red, burgundy red or creamy white. The light green or variegated foliage may get a bit sparse through winter. Foliar lobes are quite variable, or lacking.

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King Palm

King palm prefers frostless climates of Southern California.

Where it grows wild in rain forests of eastern Australia, the piccabeen or bangalow palm, Archontophoenix cunninghamiana, is a strikingly elegant tree that gets to about fifty feet tall on a clean, slender trunk. The six to ten foot long feather fronds (pinnate leaves) form a light but distinctive canopy about ten to fifteen feet broad. Smooth green petioles (leaf stalks) encase the upper few feet of crownshaft, eventually peeling away cleanly to reveal the smooth trunk as it grows below. A juvenile king palm does not bloom, but eventually flaunts adulthood with softly pendulous ‘graduation’ tassels of profuse but tiny purple tinged white flowers.

Locally, this palm is known more commonly as the king palm, and does best as a large houseplant or where it is protected from frost. Outdoors, it seem to be happiest close to the San Francisco Bay where it is somewhat insulated by all the water, but can unfortunately get smacked about by the wind there. A mature tree is somewhat more tolerant to frost than a young tree is, but can be damaged or even killed if it gets cold enough.

King palm fortunately does well in the partial shade of larger adjacent trees or buildings that might shelter it from frost. However, it can not be pruned down for clearance from higher trees, ceilings or any other overhead obstruction (including utility cables), so should be planted where it has plenty of room to grow vertically, or where no one will mind it getting removed when it gets too tall after many years.

Unlike most other palms, king palm does not transplant easily when mature. It has no problem getting planted from a pot to a larger tub or planter, or into the ground. Once in the ground though, it is there to stay.

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Hurricane Hillary

Rain is expected to start about six or seven in the morning in Brent’s neighborhood.

California is so big that, from here, it extends about four hundred miles to the north and four hundred and fifty miles to the south. That is where San Diego County is, in the southwestern corner of California. It is so far away that the weather there can be very different from here, as it is now that Hurricane Hillary is coming up from the coast of Baja California. While a tropical storm warning is in effect there, typical summer weather is expected here.

Typical summer weather here is dry. Not much rain happens after early spring. Not much happens prior to late autumn. Every few years, a single odd and brief thunderstorm goes through in the middle of summer, leaving no evidence of its downpours two days later. If it were to happen this year, it should happen about now, like it is in Southern California.

Forecasts for the weather in Southern California are quite unpleasant. A friend in Palm Springs was filling sandbags today. Floods and mudslides are expected through a huge area. This is the first tropical storm in California since 1939, and the first ever tropical storm warning. Yet, we will miss it completely here.

I try to remind myself that the historically torrential rain of last winter was no fun. Flooding was a mess, and caused significant damage even in this neighborhood. Nonetheless, even native Californians can start to miss rain late in summer.

Brent will likely telephone at about seven in the morning. It might be raining by that time. It should finish by noon on Monday. Realistically, it will not rain for long. The problem is that rain will be torrential, especially at high elevations out in the deserts, which do not absorb much water. It will be interesting to see what transpires.

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Oem

This picture is from my Six on Saturday post for this morning.

Its name is so minimalistic and blunt in the language of the indigenous people who are most familiar with it. Others might know it as the giant highland banana. It seems to me that most of us who find it to be of interest know it by its botanical name of Musa ingens.

Oem, or giant highland banana, or Musa ingens, is native to the tropical montane forests of New Guinea. Because it is endemic to high elevations, it does not perform so well in the sort of continually hot and humid tropical climates that most other species of banana enjoy. It actually prefers the weather to get somewhat cool at night. Therefore, it is more likely to be happier here than in Southern Florida, Hawaii or coastal San Diego County.

Not many horticultural enthusiasts grow it anyway. Actually, I do not know of anyone else who grows it. I have seen only a few comments online regarding germination of the very rare and expensive seed. Furthermore, no one seems to be successful with germination. This particular species does not generate pups as readily as other species of the genus, and even if it did, there are no established specimens from which to procure such pups.

However, its lack of popularity is less likely a result of its rarity and difficulty to propagate, but more likely because of its massive scale. In the wild, oem can grow to a hundred feet tall! It may be limited to about half as tall within cultivation, and without competition from other tall trees, but that is nonetheless a potential to get fifty feet tall! That may not seem like much relative to other trees, particularly the redwoods that are more than a hundred feet tall, with potential to get three times as tall. The concern is that banana trees are not actually trees. They are merely humongous perennials. Their pseudostems do not grow for very long before they begin to deteriorate and collapse. Pseudostems of smaller sorts may complete the process within two years, but are easily removed afterwards. Fifty foot tall pseudostems take significantly more time to mature and then deteriorate, but are not so easily removed from refined landscapes. Arborists can not climb them to cut them into sections. They require space to fall harmlessly. They are full of water, so are very heavy.

Now, oem lives here. It is merely a single dinky pup, but grows very efficiently. I have no idea of what to do with it. It can likely stay canned through this year, but may need to go into the ground next year. Not only does it need plenty of space, but it does not conform to the styles of any of the landscapes here. Consequently, it might eventually inhabit my home garden, regardless of its awkward appearance. This will likely get very interesting.

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Six on Saturday: Brent’s Pointless Pictures V – Hawaii

Brent left for vacation in Hawaii at about the same time that I returned from vacation in Oregon and Washington. Since I told him to stop sending me so many pointless pictures prior to my vacation, he is now sending even more. I might have gotten more pictures of his vacation than I got of mine. Although I would like to see Hawaii for the horticultural aspects, I am not otherwise impressed by what little I know about it. Perhaps I would get a better impression of it without so many of Brent’s pointless pictures. These are a few of the lesser pointless pictures, without the selfies.

1. Accommodations were quite comfortable. Brent enjoyed the forests around this guest house, which was only a few miles from the Penthouse in Waikiki that he also stayed at.
2. Palms of all sort are common in Hawaii. I have no idea what the palms to the left are. Nor can I know if this is a picture of those palms, a rainbow, or a utility pole with cables.
3. What is this? It must be in the Araceae Family. It looks like some sort of Philodendron that does not develop a vining stem. Some familiar species are not so familiar in Hawaii.
4. Doum palm is a weird palm that branches. There are actually a few species within the same genus. No one seems to know why it was never popularized in Southern California.
5. Is this Kentia palm? There are so many unfamiliar palms in Hawaii that identification is baffling. This group certainly is pretty. The palms to the left looks a bit more familiar.
6. Brent labeled these as windmill palms. If they are, why are their trunks bald? Perhaps they are one of those few shedding species of Trachycarpus that is not yet available here.

This is the link for Six on Saturday, for anyone else who would like to participate: https://thepropagatorblog.wordpress.com/2017/09/18/six-on-saturday-a-participant-guide/

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Tropical Hibiscus

This tropical hibiscus was found in Oklahoma, where it needs shelter from frost.

This humongous six inch wide tropical hibiscus, Hibiscus rosa-sinensis, looks like it might be from Hawaii or Florida, but was actually found in K and K Nursery and Landscape of Norman, just south of Oklahoma City, where winter nights are already seriously cold by our coastal California standards. It is happy to bloom so impressively only because it is in a greenhouse. Even here in our pleasantly mild climates, tropical hibiscus are happiest where sheltered above from frost, by eaves or evergreen shade trees that are high enough to also allow warming sunlight through. In the cooler spots, even sheltered plants occasionally get damaged by frost, and need some time to regenerate after winter.

Some of the classic tropical hibiscus that typically have smaller flowers can grow above single story eaves if not pruned down. Most modern varieties with larger or ruffly double flowers rarely reach the eaves, and many stay less than six feet tall even without pruning. The evergreen foliage has an appealing glossy sheen, which is an ideal backdrop for the red, pink, white, yellow or orange flowers.