Plant Ilex verticillata 'Winter Red' for reliable winter color from its glowing red berries held on leafless stems. This deciduous winterberry holly is a multi-stem shrub with an upright-rounded habit that becomes especially showy after frost and leaf drop. At maturity it typically reaches about 96-120 inches tall, with a similar overall width when given room.
For the best berry display, site it in full sun to part shade; it will tolerate deeper shade, but flowering and fruit set are usually reduced. Because the colorful berries form on female plants, be sure to include a compatible male winterberry nearby for pollination (one male can service several females) if you want heavy fruiting.
Give it consistently moist, acidic soil. Winterberry is well suited to moist garden beds, low spots, and rain-garden edges, and it can handle occasional wetness once established. Mulch to keep roots cool and evenly moist, and water during dry spells, especially in the first year. Prune in late winter to early spring if you need to shape or renew the shrub; fruiting occurs on new growth. Leave berry-laden stems for seasonal cut branches, and let the fruit provide late-fall and winter interest for you and wildlife.