Causes. The most common causes of megaloblastic anemia are deficiency of either cobalamin (vitamin B12) or folate (vitamin B9). These two vitamins serve as building blocks and are essential for the production of healthy cells such as the precursors to red blood cells.olate, which is also known as folic acid, is a B vitamin that is normally found in green leafy vegetables, citrus fruits, and certain grains and nuts. Folate deficiency can occur in diets that supply insufficient amounts of these foods.
While the Callery pear is popular for its attractive flowers, this tree puts on an autumn display of variegated foliage in red, purple, orange and yellow tones. The best time to prune your flowering pear is in late spring, once the flowers have passed for the year. credit: IT Stock Free/Polka Dot/Getty Images.
It will grow well in full sun and a slightly acidic soil; if you own a pH testing kit, aim for a soil pH of 6.0 to 6.5. The pear tree is hardy to USDA Zones 4 to 9. Once your cutting is rooted and planted in the garden, it will require very little care. It will not, however, bear fruit for two to four years.