According to the University of Florida, the English ivy (Hedera helix) is the most popular ivy grown in the United States. It is sometimes planted in large pots, but more commonly is planted in the garden and grown as a ground cover or trained along a wall, trellis or fence. While an English ivy is generally easy to care for, including water, it does need special attention, especially if it is potted or is a first year plant.
Water potted English ivy thoroughly when the soil dries to a depth of 1 inch. Water it with room temperature water until it drains out the bottom and stop. Dump out any extra water that accumulates in the drainage tray.
Water a garden English ivy plant regularly during the first year from spring until fall. When rainfall does not amount to at least an inch a week, water the ivy with enough water to equal an inch of water. For example, if it rained 1/2 inch one week, then you only need to water your ivy with another 1/2 inch of water.
Water an established garden English ivy during long dry spells, such as three or more weeks. Then, water the ivy with about 2 inches of water every two to three weeks until the drought is over.
Water garden English ivy in the fall, about one week prior to the ground freezing. This will keep the plant hydrated during the winter months.