By our calculations, you should look at sowing Hawaiian Supersweet #9 about 10 days after your last frost date.
Breeding of tropical sweet corns began in Hawaii in the 1940s, then expanded in the 1970s to breeding of high-sucrose corns in Thailand and Australia.
Three significant corn populations, among 21 released from Hawaii, undergird most tropical improvement—‘Hawaiian Sugar’ in 1944 (gene, sugary-1),
‘Hawaiian Supersweet #1’ in 1968 (gene, shrunken-2),
and ‘Hawaiian Supersweet #9’ in 1977 (gene, brittle-1).
These varieties are about 25% temperate and 75% tropical.
They are derived largely from Caribbean flint varieties that served historically as vegetable corns.
Sweet corn breeding nurseries have been planted monthly in Hawaii for four decades, and harvesting is weekly. ‘Hawaiian Supersweet Silver’, released in 2006, has 25 cycles of recurrent selection by inbreeding.
Hawaii’s Hi38cy1 counts 78 generations in its pedigree. Major breeding methods are recurrent mass selection applied before pollination, and backcross conversion.
Has good resistance to tropical viruses, southern and common rusts, turcicum and bacterial blights, and insect pests. 1
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