How can I effectively prune a weigela plant to promote healthy growth and abundant flowering?

To effectively prune a weigela plant for healthy growth and abundant flowering, start by removing dead or damaged branches. Then, prune back one-third of the oldest branches to encourage new growth. Cut back any overly long or straggly branches to promote a more compact shape. Prune after flowering in late spring or early summer to avoid cutting off next year's flower buds.