Spain's cactus-growing in Michigan and here in an 800-square-foot bed in central Connecticut led to his " Growing Winter Hardy Cacti in Cold / Wet Climate Conditions " ( Elizabeth Harmon, 1997 ), a concise guide.
32.
Not all leeks are winter hardy, so if you intend to leave your leeks in the ground to overwinter, choose a hardy variety like Bleu Solaise, Siegfried or Laura, and mulch them after the ground freezes.
33.
The young shoots are crimson with reddish purple new foliage that turns to a glossy slightly blue dark green .'Violet Carson'is ( almost ) thornless, rain tolerant, and winter hardy down to-23 �C ( USDA zone 6 ).
34.
The foliage consists of five oval-round leaflets with a matte surface and a bright mid-to dark green colour .'G�n�ral Jacqueminot'is winter hardy down to-26 �C ( USDA zone 5 ), but rather susceptible to rust and mildew later in summer.
35.
The vigorous shrub has dark green foliage, reaches a height of 75 to 125 cm ( 30 " to 48 " ) at a width of 60 to 75 cm ( 2'to 30 " ), is winter hardy up to-20 �C ( USDA zone 6b ) and very disease resistant.
36.
The vigorous shrub grows 120 to 200 cm ( 4 ft to 6 ft ) high and 90 to 125 cm ( 3 ft to 4 ft 1 in ) wide, is winter hardy down to " 23 �C ( " 9 �F, USDA zone 6 ), half-shade tolerant, and disease resistant.
37.
The cultivar is a robust, near-thornless rambler, growing from 3 to 6 metres ( 10'to 20') in height, but can reach heights of over 10 metres . half-shade and poor soils, and is winter hardy up to-29 �C ( USDA zone 5 ), but should be planted in airy locations, as it is susceptible to mildew.
38.
Roger Way, Cornell University's legendary apple breeder ( the father of the Empire and the Jonagold, among many others ), said that he expects the genes of these oddballs to yield new cultivars that will be " more disease and insect resistant, more winter hardy, and higher in eating quality " than the apples of today.
39.
However, difficulty in using genes from " Z . perennis " in " Z . mays mays " for crop improvement has occurred because the genes used often contain unwanted teosinte traits . " Z . perennis " is tropical and not winter hardy, which has led to problems in using its genes to make a perennial form of maize.
40.
The bushy rose shrub has dense, glossy foliage and usually grows to a height of 70 to 120 cm ( 28 " to 4') and a width of 75 to 80 cm ( 30 " to 31 " ) .'Elina'is only moderately winter hardy ( USDA zone 6b ), a thrips favourite, but excepting mildew in humid conditions very disease resistant.
