Since a large portion of the water applied will be consumed by the lawn, substantially more water should be applied around the roots of the tree. To visualize the amount of water a birch tree can consume, consider that during a typical spring day, a large birch will extract enough water from the soil to fill about ten bathtubs. It is so simple and rewarding to attract them that no garden should be without a few. Adult butterflies are attracted to a number of nectar producing plants. They favor plants that have large petals to provide a perch, though multiple small florets work as well.
Purple flowers seem to be most attractive to butterflies, followed by yellows, pinks, and whites.
Since its introduction form Europe about 1930, it has destroyed millions of elm trees across North America. At present, the disease is prominent in Manitoba, North Dakota and Montana, placing all Saskatchewan elms at risk. DED is caused by a fungus and is spread from one elm tree to another by elm bark beetles. The fungus disrupts the tree's water conduction system, causing the leaves to wilt and, usually within one to two seasons, the tree to die. Elm bark beetles breed under the bark of dead or dying elm wood.