Blue Muffin® Arrowwood Viburnum (Viburnum dentatum 'Christom')
Planting: Choose a location with full sun to partial shade (6+ hours of sun gives the best flowering and berry production). Plant in well-drained soil. Dig a hole 2–3 times wider than the root ball but no deeper than the root ball. Set the top of the root ball level with the surrounding soil. Backfill with the original soil, firm gently, and water thoroughly to remove air pockets. Apply 2–3 inches of mulch, keeping it a few inches away from the stems.
Watering: Water deeply immediately after planting. For the first 2 weeks, water every 2–3 days if there is no rain. For the next 2–3 months, water deeply once or twice a week. After the first growing season, water during extended dry periods. Deep watering is better than frequent light watering.
Fertilizing: Skip fertilizer at planting. The following spring, apply a balanced slow-release fertilizer according to the label or top-dress with compost.
Pollination: Blue Muffin® needs a different arrowwood viburnum cultivar nearby (such as 'Chicago Lustre' or 'Northern Burgundy') to produce its bright blue berries. Bees and other pollinators handle the pollination.
Pruning: Prune immediately after flowering if needed, since flower buds form on old wood. Remove dead or crossing branches at any time.
Harvest/Wildlife: The ornamental blue berries are not typically harvested for eating. They are highly attractive to birds, making this an excellent wildlife shrub.
Container planting: Suitable only as a temporary container plant. Use a pot at least 24 inches wide with drainage holes and high-quality potting mix. Water more frequently than in-ground plants, and transplant into the landscape within a few years, as the shrub matures to about 5–7 feet tall and wide.