Winter Red is the native deciduous holly grown for one thing, and it does that thing better than anything else in the garden. It drops its leaves in fall and leaves behind bare stems packed with bright red berries that hold from October into February. Against snow it is the strongest winter display available in a hardy shrub. It reaches 8 to 10 feet tall and wide, hardy from Zone 3 through Zone 8, in full sun to part sun, and it takes three or four seasons to build a real berry display.
You need a male pollinator for berries. Winterberry plants are either male or female, and this is a female selection. Without a male within about 50 feet, you get a green shrub and no fruit. Southern Gentleman is the standard pollinator for Winter Red because their bloom periods overlap. One male covers up to about five females.
Songbirds take the fruit through late winter, and the berries persist because they are unpalatable until repeated freezing softens them.
It is native to wet ground and tolerates soil that stays saturated, which makes it one of the best shrubs for a rain garden, a pond edge, or a low spot that never drains. It also grows fine in ordinary garden soil as long as it does not dry out badly. Deer leave it alone. It wants acidic soil and will yellow in alkaline ground.