Pruning Spiked speedwell
When and how — Veronica spicata
Prune your spiked speedwell in July, August and September — the optimal month is usually August.
The next pruning window is July.

When to prune?
The perennial spiked speedwell is pruned in July, August and September.
With perennials, pruning is really seasonal management.
You don't prune perennials the way you prune shrubs. The work happens at three moments: (1) deadheading spent flower stems during the season to encourage repeat bloom, (2) optionally cutting back to about 10–15 cm above ground in late autumn, and (3) clearing all the old foliage in March before the new shoots emerge. Many gardeners now deliberately leave the old growth standing through winter — it protects the crown and shelters overwintering insects. Which approach to choose depends on taste and species: evergreen perennials (hellebore, bergenia) look better left alone, while wet-rotting species (hosta) need to come down after the first frost.
How to prune spiked speedwell
Veronica spicata does not require heavy pruning, but timely deadheading and a light tidy-up will keep plants looking good and encourage further flowering. The main pruning window runs from July to September, coinciding with and following the flowering period that stretches from early summer through to late summer. Deadhead spent flower spikes regularly throughout the flowering season by cutting them back to just above a set of leaves or side shoots. This not only keeps the plant tidy but often stimulates a second, smaller flush of blooms later in summer or early autumn. Use secateurs or sharp scissors for a clean cut—ragged tears can invite disease. In late summer or early September, once the main flowering has finished, cut back the flowering stems by about half to two-thirds. This prevents the plant from becoming leggy and encourages a compact, bushy shape. If you prefer a more naturalistic look or want to leave seed heads for wildlife and winter interest, you can delay this cut-back until late autumn or early spring, though the plant may look scruffier over winter. In early spring, before new growth begins in earnest, tidy up any remaining dead or damaged stems and remove old foliage. This is also a good moment to divide congested clumps every three to four years to maintain vigour. Simply lift the plant, tease or cut the root ball into sections, and replant. No specialist tools are needed—secateurs and a sharp spade are sufficient for all veronica spicata pruning tasks.
Common mistakes
✗ Cutting back too early in spring
Late frost can still strike and the old foliage protects the crown. Wait until the first new shoots are visible (usually mid-March) — then you know the season has actually started.
✗ Skipping deadheading
Hardy geranium, salvia, lupin and delphinium will give a second flush if you cut spent stems back to just above a pair of healthy leaves as soon as the first flowers fade.
✗ Cutting ornamental grasses down in autumn
The dry stems are the whole point of winter interest, AND they protect the crown from frost and waterlogging. Cut down to a fist's height only in late February.
Hold off on pruning
Better to wait than prune at the wrong moment. The next optimal window is July. Until then: leave the plant alone — only remove dead or diseased wood (which you can do year-round).