How to Prune saw-leaved speedwell?
Remove spent flowers and cut back in the early autumn as foliage is lost and plants become untidy

saw-leaved speedwell · Veronica austriaca subsp. teucrium
Also known as: Hungarian speedwell
Grow in loamy, moderately fertile, moist but well-drained soil in full sun or partial shade
Remove spent flowers and cut back in the early autumn as foliage is lost and plants become untidy