Horticulture Digest | Date Last Edited: 08/24/2001 |
![]() Hawaii Cooperative Extension Service
By agreement with the Fynbos Experiment Research Unit of the Vegetable and Ornamental Plant Institute (VOPI) of the Agricultural Research Council of South Africa and with the cooperation of the USDA, in 1988 a number of Protea hybrids were imported into Hawaii for evaluation at the Maui Branch Station of the Hawaii Institute of Tropical Agriculture and Human Resources (HITAHR) of the University of Hawaii. Evaluations of plant growth characteristics, adaptability to the Maui environment, yield, seasonality of bloom, and keeping quality were carried out during 1989 to 1993. This summary reports on yields and seasonality of bloom from August 1992 through July 1993. Table 1 shows the total yields of single "average" plants during this period.
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Table 1. Yields and seasons of flowering on Maui for South African Protea accessions (1992-1993). Percent of annual yield by month __________________________________________________________ Cultivar Yield Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Guerna 86 8 16 5 4 1 2 1 1 2 2 5 53 Sneyd 1 0 0 0 0 0 0 0 0 100 0 0 0 Embers 1 0 0 0 0 0 0 0 0 100 0 0 0 Susara 1 0 0 0 0 0 0 0 0 100 0 0 0 Cardinal 31 9.6 0 0 0 0 13 9.6 13 13 16 9.6 16 Sylvia 66 3 2 6 2 5 14 9 12 9 9 9 20 Andrea 5 40 0 0 0 0 60 0 0 0 0 0 0 Brenda 210 0 0 1 12 80 7 0 0 0 0 0 0 Red Baron 86 4 1 12 14 17 7 19 23 0 3 0 0 Pink Satin 0 0 0 0 0 0 0 0 0 0 0 0 0 Lady Di 9 0 0 0 0 22 56 11 11 0 0 0 0 Ivy 1 0 0 0 100 0 0 0 0 0 0 0 0 Carnival 14 36 14 14 0 0 0 0 0 0 7 7 22 Annette 37 0 0 0 0 37 27 14 11 5 3 3 0 Breggie 25 0 0 8 24 40 12 0 16 0 0 0 0 Elsie 15 0 0 0 0 40 27 20 13 0 0 0 0 Noel 14 0 43 50 0 0 0 0 7 0 0 0 0 Riette 0 0 0 0 0 0 0 0 0 0 0 0 0 Regina 23 0 0 17 30 9 0 0 0 0 0 44 0 Mashuda #1 5 0 0 60 40 0 0 0 0 0 0 0 0 Mashuda #3 27 0 0 0 4 62 15 11 4 4 0 0 0 Heibrech 45 11 20 22 7 2 22 7 2 0 2 5 0
Of interest is the distribution of blooms during this one year period,
expressed as a percent of the annual total for each month (Table 1). Some
cultivars have a longer season of bloom than others. Among the seasonal
bloomers, it is possible to select cultivars to cover a large portion of
the year, although spring and summer months are not well represented. Descriptions of some VOPI cultivars as provided by South Africa follow, except the seasons of bloom are reported for Maui conditions.
![]() 'Guerna' was selected from the Kouga variant of P. repens. Flower color: deep red. Peak flowering time: July-September, but scattered flowers were cut throughout the year. 'Sneyd' has the medium-sized, deep red flower of the Alicedale variants. It has high yield and good stem length. On Maui, it produced one flower during April, but South Africa reports about a 6-week bloom period. 'Embers' has a medium-sized flower, each bract a deep red at the tip and creamy-white basally. It has a shiny, smooth texture, and flowers after 'Sneyd' in South Africa, but concurrently with 'Sneyd' in April on Maui. South Africa recommends it for garden use.
![]() 'Susara' is a hybrid between P. magnifica and P. susannae. It produces small to medium flowers with an unusual shape, having soft salmon-pink and light red shades. It produces a high yield on exceptionally long stems. Its Maui flowering period was April, but South Africa reports a 6- to 8-week bloom. It may tolerate a slightly alkaline soil.
![]() 'Cardinal' is an outstanding P. eximia type. It has a medium-sized deep pink-red flower with a satin sheen; long, straight stems; and high yield. Flowering time is January to May on Maui. 'Sylvia' has a medium-sized, deep pink-red, P. eximia type flower. It has a high yield and flowers from January to mid-summer on Maui.
![]() 'Andrea' is a hybrid between P. compacta and P. magnifica. It produces a large, striking, medium pink-red flower with numerous series of bracts. It has high production; long, straight stems; and flowers from mid-winter to spring in South Africa but produced three flowers in January during its year of evaluation on Maui. 'Brenda' has medium-sized, deep-pink-red flowers with a shiny smooth texture. It has a high yield and flowers from November to January on Maui. 'Red Baron' is a P. obtusifolia X P. compacta hybrid with a small- to medium-sized flower with dense brilliant, deep red bracts lined with short, white hairs. It has a high yield and flowers from October through March.
![]() 'Satin Pink' is a small, multi-pastel shaded flower with soft pink-red and cream shades. It has a high yield but failed to flower on Maui in the year of evaluation. In South Africa, it has a 3-month season in the winter.
![]() 'Ivy' has high yields; long, straight stems; and small foliage. It is harvested in the elongated bud stage (candle) in South Africa. Bracts pinkish. Not a VOPI selection, but a Protea Heights exclusive. A novelty. Too few flowers to define a season in Hawaii, but its season should be late summer to fall.
P.E. Parvin, and P. Shingaki, ta_maui1@avax.ctahr.hawaii.
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