Botanical: Corylus avellana 'McDonald' Common: McDonald Filbert Habit: Spreading, multi-stemmed deciduous shrub. Mature Size: Reaches 15-20 ft tall and 10-15 ft wide. USDA Hardiness Zones: 4-8 Bloom Time: Late winter to early spring, producing ornamental catkins. Bloom: Features yellow catkins that add winter interest before the large, flavorful hazelnuts develop in late summer. Customers want it for a reliable, tasty harvest and its attractive form. Care: Plant in full sun to partial shade in well-drained soil. Water regularly, especially during establishment and dry periods. Prune to maintain shape and remove suckers if desired. Note: Nuts are a favorite of squirrels and other wildlife; protection may be needed for the harvest. This plant is not considered deer resistant.