The Anah Kruschke rhododendron (R. Anah Kruschke) is a cultivated variety that grows up to 5 feet tall and can tolerate winter temperatures down to minus-15 degrees Fahrenheit. The Anah Kruschke rhododendron also has a better tolerance to heat and scorching sun than other varieties. This rhododendron blooms in globe-shaped clusters of 10 to 12 purple, funnel-shaped, 3-inch-wide flowers. The shrubs have evergreen, glossy and yellowish-green leaves that are 4½ inches long. This rhododendron can be planted in landscapes as an individual specimen, foundation planting or hedge shrub.
Water your Anah Kruschke rhododendron deeply and thoroughly once each week during the summer when rainfall is less than 1 inch.
Feed in late spring or early summer with a fertilizer made for acid-loving plants, or a 6-10-4 NPK formula. Spread the fertilizer on the ground around the base of the rhododendron over the entire root area, applying a rate of 2 pounds per 100 square feet of planting bed.
Spread a 2-inch-thick layer of coarse organic mulch on the ground over the root area to control weeds and preserve soil moisture. Pull the mulch about 2 to 3 inches away from the trunk.
Prune the rhododendron immediately after the shrub finishes flowering to reduce its height or shape the shrub. You can prune dead, damaged or diseased branches anytime of year.