Minus 35 degrees
1 Yucca rupicola. 2  Fascinating type of yucca as its leaves are unique from that of other yucca leaves. 3  The leaves are dark green in colour; strap shaped, two inches wide, and form rosettes not greater than two feet tall. 4  It is also termed as the Twisted-leaf yucca due to the ability of its leaves to twist with age. Growing Yucca Plants from Seeds. If you want to grow Yucca tree from seed then it is best to start indoors. Yucca seeds take anything from one month to one year to germinate and are best sown at the end of winter. Germinate Yucca at 18 to 25 degrees centigrade and grow them indoors for about three years. Adam's needle (Yucca filamentosa) is widespread in USDA plant hardiness zones 5 to 10 where it endures harsh winter weather in the colder climes well. However, when temperatures drop unusually low or stay low for an unusually long time, Adam's needle can be killed or damaged. Yucca flowers range in color from white to ivory or cream tinged with pink or green. Yucca is a plant for all seasons and many types of climate and cultural conditions. Dried yucca leaves and trunk fibers have a low ignition temperature, making the plant desirable for use in starting fires via friction. In rural Appalachian areas, species such as Yucca filamentosa are referred to as meat hangers. The natural distribution range of the genus Yucca (49 species and 24 subspecies) covers a vast area of North and Central America. From Baja California in the west, northwards into the southwestern United States, through the drier central states as far north as Alberta in Canada (Yucca glauca ssp. albertana) Yucca species are the host plants for the caterpillars of the yucca giant-skipper (Megathymus yuccae), ursine giant-skipper (Megathymus ursus), and Strecker's giant-skipper (Megathymus streckeri). The natural distribution range of the genus Yucca (49 species and 24 subspecies) covers a vast area of North and Central America. From Baja California in the west, northwards into the southwestern United States, through the drier central states as far north as Alberta in Canada (Yucca glauca ssp. albertana Yucca schidigera. Also called the Spanish Dagger, this evergreen shrub or small tree has a few upright branches and bayonet-like leaves from 2 to 4 feet long and 1-1/2 inches wide. The trunk is grayish-brown and 6 to 12 inches in diameter. The Mojave Yucca grows to a height of 16 feet. Flowers of the Yucca genus -- which includes the Joshua Tree (Yucca brevifolia) -- depend on the small, white Pronuba Moth for pollination. Interesting Facts About Yucca Plants. . . 1  Yucca wood has the lowest ignition temperature of any other wood, which makes it useful as a fire-starter. 2  The state flower of New Mexico is the yucca flower.. 3  Yucca plants are reliant on the yucca m Protecting Yuccas from Frost Damage. The best way to help a yucca during cold weather is to make sure that as little damage as possible happens to the yucca plant during a frost or freeze. Cold-sensitive yuccas must be protected to avoid damage from frost and cold weather. The yucca plant has not had time to prepare itself for the freezing weather and may need protection for a little while until it hardens up some. Advertisement. To protect your yucca from cold, start by covering your yucca with a cloth sheet or blanket. Soapweed Yucca. Soapweed yucca (Yucca glauca) thrives in the cold temperatures of USDA plant hardiness zone 3, with winter temperatures dipping as low as minus 35 degrees. Native to dry plains and grasslands, soapweed yucca thrives in full sun and very well-drained soil. Yucca flowers range in color from white to ivory or cream tinged with pink or green. Yucca is a plant for all seasons and many types of climate and cultural conditions.
http://www.gardenershq.com/Yucca-plant.php http://homeguides.sfgate.com/yucca-plants-cold-temperatures-29728.html https://en.wikipedia.org/wiki/Yucca https://en.wikipedia.org/wiki/Yucca http://www.desertusa.com/cactus/mohave-yucca.html http://www.gardeningknowhow.com/ornamental/foliage/yucca/yucca-cold-weather.htm http://homeguides.sfgate.com/yucca-plants-cold-temperatures-29728.html
what is the temperature range for yucca plants