Dark lord geraniums are rare hybrids of the hardy geranium plant. They have dark green and purple foliage with purple flowers. They grow 8 to 10 inches high and typically are planted in USDA plant hardiness zones 4 to 8. Dark lord geraniums are planted in the same manner as other geraniums. Like other geraniums, they are deer resistant. Plant your dark lord geraniums after the last frost in the spring.
Plant your dark lord geraniums where they will receive at least four hours of direct sunlight each day. Plant in areas that provide some early afternoon shade if you live in a warmer climate.
Till the soil about 8 inches deep and incorporate about 2 inches of compost, peat moss or similar organic matter to help the soil drain. Mix in a granular fertilizer labeled 10-20-10 at a rate of 1 lb. per 100 sq. ft.
Dig holes in the new planting bed that are twice as wide and just as deep as the plant's containers. Space the dark lord geraniums 12 to 15 inches apart.
Take the dark lord geraniums out of their current containers. This is easier to do when the soil is wet.
Set the geraniums in the holes (soil and all). Backfill the soil and lightly pack it down to remove possible air pockets. Give the area about 2 inches of water.
Spread a 2-inch layer of organic mulch, such as bark or wood chips, around the plants to help the soil remain cool during the summer as well as help retain moisture.