Are trying to get berries from your cranberry? If so the pros grow this plant in bogs so they can flood the roots and control pests. It is blooming and growing so it sounds healthy. The flowers do not last long so do not expect more than 2 weeks of blooms. I would not recommend more fertilizer as you already feel the need to prune it back. This native plant is best enjoyed in casual planting areas and in most home gardens it is not practical to expect a harvest of berries. Now for your lace-cap hydrangeas you can safely prune them by removing thin canes and shortening long branches in early spring. If you have the newer varieties such as 'Twist and Shout' lacecap hydrangea you can prune anytime of year as this type blooms on new and old growth. If you live in an area with mild winters or the shrubs are in a protected area you can tidy up the plant by removing spent blooms in late summer or fall. In general hydrangeas do best if they are never pruned. Instead give them enough room so they can grow into their natural size and they will be happy and look their best. Keep growing, Marianne Binetti