Difference between revisions of "Pritchardia hillebrandii"

An attractive and easy to grow loulu in the landscape. Looks nice in small groves of three or more palms or can be show cased with a single loulu. They are slow growing attaining a mature height to about 20 feet or so and with a trunk diameter of 10 inches. Due to the natural coastal habitat of loulu lelo, it does very well in low elevation landscapes and tolerates some salt spray. This is a smaller fan palm that grows well in full sun with good drainage. Does best in full sun. At higher elevations requires partial shade. (Garrett Webb, Kalaoa Gardens)

Apply a complete palm fertilizer with minor elements as directed on label. Be certain that sufficient magnesium and potassium is present in the fertilizer component. This is especially critical for loulus in pots. Magnesium and potassium deficiencies are two of the most serious nutritional disorders in palms. The deficiencies are characterized by bright yellowing (chlorotic) on leaf edges or streaking or the entire fronds yellowing. This can be difficult to reverse. Applications of Epsom salt, or magnesium sulfate (MgSO4), is good but does not last and is usually washed out of the soil in rainy periods. There are some very good slow release fertilizer spikes made for especially for palms on the market which contain a good balance of minor elements with magnesium and potassium. [4,5] Potted or younger loulu planted in the ground appreciate a foliar feeding of kelp or fish emulsion and Epsom salt monthly or bi-monthly. (Encyclopedia of Life curator Dr. David Eickhoff)

Needs to dry out in between watering's.

Loulu lelo is prone to leaf rollers, red spider mites and sugar cane borers. Rats will eat the fruit.

Pritchardia hillebrandii is an easy to grow palm but not often available for the landscape. Pritchardia hillebrandii vary in shape. Specimens raised in dry and/or infertile soils tend to be smaller in stature with smaller leaves. Light also affects the plant's form while those grown in full sun are more compact. This palm prefers a sunny, well drained, and moist location. Growth rate: It is a slow growing, short stocky palm. Soil: It likes organic soil, but is adaptable to clay and loam bolth slightly alkaline and acidic. Good drainage is also important. Fertilization: Need a perfect fertilizer diet including all micro nutrients and trace elements or slow release fertilizer. Micro-nutrient deficiencies are occasional problems. If it doesn't get enough Mn and Fe (Iron), the leaves take on a rather unhealthy yellow colour. Micro-nutrient deficiencies only show up on soil with a high pH. Fertilize often for faster growth. Water Requirements: Needs regular water, do not let dry out between waterings. however it does not want to sit in continually wet, mucky soil. The roots and lower trunk can rot if soil is kept too moist. Light: Prefers full sun but will tolerate half day sun. Hardiness: It is adapted to tropical and subtropical climates, young plants are more cold sensitive. Maintenance: Remove dead fronds and spent fruiting stalks for a clean landscape appearance. Fronds can be left on the palm to form a skirt for natural settings. Palms recycle nutrients from dead or dying fronds and use them for healthier fronds. Palms only have a set number of new leaves that can sprout and grow per year and removing fronds will not increase that number. If you cut off more than what will grow annually, you could be left with a pretty bare and bald palm. Pest & Disease: Mealybugs and whiteflies underneath the leaves can present problems at times if not kept in check. A generous spray of water can wash them off. Ornamental: It is cultivated as an ornamental tree, and planted in gardens and parks in tropical and sub-tropical climates either as a single specimen or in groups. Culture in containers is possible although growth rates are slower. A bright patio will provide an excellent environment for young specimens which can eventually be planted in a sunny location. (llifle.com)

Etymology: Pritchardia name is dedicated to William Thomas Pritchard (1829-1907), British official stationed in Fiji in the 19th Century, British counsul in Fiji, adventurer, and author of Polynesian Reminiscences in 1866. Hillebrandii name honors the botanist W.F. Hillebrand (1853-1925). The epithet was named for William Hillebrand (1821-1886), a young Prussian physician and plant collector. He planted many of the plants he collected at Queen's Hospital and on his own property in Nuʻuanu. After moving back to Germany the property was sold to his neighbors Thomas & Mary Foster. Today, it is known as the Foster Botanical Gardens. There are several Pritchardia hillebrandii growing in the gardens, once Hillebrand's property. (Naomi Hoffman, Foster Botanical Garden.)

Uses: An amazing use by early Hawaiians was a sport somewhat like today's hang gliding. Reportedly, daring souls would climb Huelo Islet seastack, cut suitable fronds, attach fronds like wings, and then jump to glide to the ocean over a hundred feet below! ( "Paddling My Own Canoe" by Audrey Sutherland, page 131.)

Conservation: Pehaps once common along the northern coast of Molokaʻi. As recently as 1976, fifteen loulu lelo were found in the valleys and the base of the sea cliifs of north coast of Molokaʻi. They are extinct there today, likely because of goats and rats.

Loulu lelo is now restricted to mostly Huelo Islet, a 200-foot seastack, rising from the ocean off the windward coast of Molokaʻi. About 200 loulu lelo live in the 2 to 3 acre a top this islet due to the absence of rats and goats. There are also ten trees on the nearby islets of Mōkapu as well. They are being reintroduced by Bill Garnett, a naturalist on Molokaʻi, in fenced areas on Kūkaʻiwaʻa Point on Molokaʻi. ("Loulu: The Hawaiian Palm", pages 1, 92-93, 95.)

The palm is variable in overall appearance with green leaves, ranging to the "blue dwarf" which has, according to specimen, more or less waxy glaucous leaves on both sides. The "blue dwarf" is regarded as especially attractive. Rock (1921) described a 'robust' variety with very large leaves, being cultivated near Kamalo on Molokai, but commented that the size of the palm may be due to soil conditions. {Wagner, W.L., Herbst, D.R. & Sohmer, S.H. 1990)

"Its faintly bluish-green costapalmate leaves are a beautiful characteristic of this palm, as well as the almost wooly petioles. There is one form of this palm with a small growth habits and blue coloration called Dwarf Blue. This is a smaller fan palm that grows well in full sun with good drainage." (Garrett Webb, Kalaoa Nursery)

"This is just one of about 20-plus species of Pritchardia that grow well in southern California. There are a few species from the South Pacific that do not, but just about all the Pritchardias native to Hawaii do fine here in So Cal. Some are much rarer than others; this is one of the most common species. A pretty robust grower, it has large, only slightly divided leaves that don't droop much, if at all. It loves water, but doesn't require a ton of it. This palm can do great in full sun near the coast but prefers some shade inland. Intense, dry heat (over 100°F) is tough on it. There are several varieties of this palm including a 'dwarf' form that has slightly bluish leaves." (Geoff Stein)

Many Pritchardias are fussy and difficult to grow outside the tropics, frequently suffering from a yellowing of the leaves. The moderately-sized P. hillebrandii, which grows in dry forest near sea level on the Hawaiian island of Molokai, is a very different prospect. It is fast growing, very modest in its requirements, and its beautiful, rigid and leathery leaves with a blue-gray cast retain their color. The fruits are mid-sized, and the seeds are easy and fast to germinate. It is suitable for a wide range of climates and will even tolerate cool conditions and a little frost. Excellent also as an indoor specimen. (RPS.com)