The arum lily creates large white blooms and is sometimes called the funeral lily according to Bulbs Direct. The flower for this particular type of lily is always white and curves around the long yellow centre. Arum lilies can grow as much as four feet in height, supported by thick, strong stems and decorate with large leaves. Care for the flower is relatively easy in wet areas.
Plant the flowers in a slightly acidic soil with a pH balance between 6.1 and 6.5, as recommended by Dave's Garden.com. Arum lilies need wet areas to grow in and are perfectly happy even in soggy areas such as around ponds. When planting the bulbs, leave between six inches to one foot between each plant depending on how much room you have.
Find an area that experiences half sunlight or indirect sunlight throughout the day. While the plant doesn't enjoy the shade, full sunlight may be too intense especially in areas that aren't constantly wet. Lilies grown in wet areas can handle more sunlight and gardeners who plant the lilies by ponds or other wet areas won't have to worry about sunlight as much, though having other plants to create occasional shade doesn't hurt.
Since the arum lily likes wet areas, watering isn't usually a concern. Dry spells can occur anywhere though and it's best to keep an eye on the plant. During hot dry seasons if the soil isn't staying wet, water the plant weekly or more if needed to keep the soil moist. Watch for signs of drooping that may indicate the plant needs more water.
When planting arum lilies, keep in mind that the plant spreads rapidly. For those who want more plants, leave plenty of empty room for the plant to grow and spread throughout. If you do not want the plants to spread, pluck up the plants that spread too far out. For this reason, it's best to plant the flowers alone instead of with other flowers.
Touching the arum lily can cause an allergic reaction in certain people. The entire plant is considered poisonous if any part is eaten. For this reason, children and pets should be watched to ensure they do not try to eat the flower. Those with allergic reactions may wish to avoid contact or avoid growing the plant altogether.