Baltic Ivy (Hedera helix 'baltica') One- to 2-inch-long, dark green, lobed leaves 6 to 8 inches high. Trailing stems root as they spread. Zone: 5-10 Light: sun or shade Comments Does best in rich, moist soil. Hardiest of English ivy cultivars. Space new plants 12 inches apart. Fertilize established planting with lawn fertilizer in early spring. Takes two or three years to completely fill area.