By our calculations, you should look at sowing Stringless Sugar Snap about 42 days before your last frost date.
‘Stringless Sugar Snap’ is a named variety of edible-pod pea which was first created by scientists at Novartis/Gallatin Valley, a gene-tech company.
This variety was then patented (SP110-24), in 1984. 1
First introduced in 1979, but not patented until 1984. Because the 1984 patent has since expired (plant patents last only 20 years), this pea variety is no longer patented.2
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