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PLUMERIA PROPAGATIONRichard Criley, University of Hawaii ASHS 2011
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P. rubra
Plumeria species
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Plumeria species
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Plumeria Plumeria –– popular lei flowerpopular lei flower
Donald Angus, benefactor
Kamehameha statue at Hawi
Jim Little, author, nurseryman
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Plumeria propagation by seedPlumeria propagation by seed
Seeds are borne in paired fruits called follicles
Open follicleSeed planted vertically with the wing sticking out. Vermiculite-perlitemedium. Germ. 8-10 days
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Plumeria seeds of different sizes, wing Plumeria seeds of different sizes, wing shapes, and colors when matureshapes, and colors when mature
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L: Seedlings ready to transplantL: Seedlings ready to transplantR: Seedlings in tray potsR: Seedlings in tray pots
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Rooting of cuttingsRooting of cuttings
Rooting hormones not necessary, but can improve speed of rooting. A hormone such as Dip N Grow at a dilution of 1:5 (2500 ppm) is adequate. Rooting hormones may be necessary for species that are more difficult to root than Plumeria rubra.
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Girdle or notch Girdle or notch 3 to 4 weeks in 3 to 4 weeks in
advance of advance of taking cuttingtaking cutting
A notch cut into a branch stimulates A notch cut into a branch stimulates callus production and better rooting callus production and better rooting on difficulton difficult--toto--root cultivars.root cultivars.
splint
Girdled branch
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Direct stick in the groundDirect stick in the ground
With bases callused to minimize rot, terminals (single or branched) and stem pieces of considerable size can be direct-rooted in the ground.
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Batch rooting or 1 cutting/potBatch rooting or 1 cutting/pot
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Bag rootingBag rooting
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Other variants for cuttingsOther variants for cuttings
Fiber pad Water Oasis block
Sand
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GraftingGrafting
Inverted wedge
Side wedge
Wedge graft
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Multiple splice grafts on plumeriaMultiple splice grafts on plumeria
PVC pipe splint to support graft
Graft unions
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Topworking onto new shoots on old trees is practiced to convert a tree to mixed colors or to convert it to a new and more desirable cultivar.
This is a common practice in Bali & Thailand nurseries
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Single bud top graftSingle bud top graft
Single bud Wedge cut Bud fitted Bud tied down
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Single bud graft Single bud graft at 8 weeksat 8 weeks
This system has been widely used in Thailand where a 30 cm cutting of a valuable variety may yield a dozen or more plants.
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Patch bud techniquePatch bud technique
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Air-layering, while not practical on a large scale, is a useful technique for the collector.
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Plumeria in tissue culturePlumeria in tissue culture
Photos courtesy of W. Sean MillerComb. Proc. Intern. Plant Prop. Soc.55:512-516 (published 2006)
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These Dwarf Pink Singapore were all These Dwarf Pink Singapore were all grown from tissue culturegrown from tissue culture
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In conclusionIn conclusionPlumeria is easy to propagate Plumeria is easy to propagate –– excepting excepting perhaps some of the species which root with perhaps some of the species which root with difficulty and the seeds are shortdifficulty and the seeds are short--livedlivedCutting propagation is most commonCutting propagation is most commonGrafting practiced by some nurseries for rapid Grafting practiced by some nurseries for rapid multiplication of new cultivarsmultiplication of new cultivarsAir layers are a fairly sure means but less Air layers are a fairly sure means but less commonly usedcommonly usedSeed yields a diverse populationSeed yields a diverse populationTissue culture not widely used because of Tissue culture not widely used because of contaminationcontamination
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