Flower Color: Orange-Red Flower Form: Tubular Cluster Flowering Period: Summer Mature Height: 8-20′(3-6m) Pruning Requirement: Prune to Shape Planting Aspect: Full Sun Cold Tolerance: USDA Zone 4 Price Group: Standard About Lonicera heckrottii Gold Flame Clusters of slender, fragrant, tubular flowers orange/crimson inside with purple crimson shading on the outside are produced June – September. The fragrance, color and hardiness make this one of the most popular honeysuckle.