Spiked water-milfoil (Myriophyllum spicatum)

Photo: Kristian Peters -- Fabelfroh 10:43, 2 March 2006 (UTC), CC BY-SA 3.0 · source

Pruning guide · Water or marginal plant

Spiked water-milfoil: when and how to prune

Myriophyllum spicatum

Spiked water-milfoil is best pruned in July–August.

Key facts
Pruning monthsJuly–August
Native to BelgiumYes

Spiked water-milfoil: when to prune it?

Thin out in July and August, when it takes up too much space.

What else to prune in those months? July · August

Spiked water-milfoil: how to prune it?

  1. Pull or rake out part of the stems; always leave a good amount as an oxygenator.
  2. Cut or pull away stems that form a dense mat at the surface.
  3. Leave thinned stems on the bank for a day so small creatures can crawl back into the pond.
  4. Gather broken fragments carefully: every piece can root again.

How much to cut, and how often?

  • One pruning period a year: July–August.

What does it mean for wildlife?

  • As a native plant, it feeds more insects than a non-native species.

Caution: Put thinned stems on the compost heap, never into a ditch, stream or pond in the wild.

Nearby: related pruning guides

Plant profile: Spiked water-milfoil · Pruning calendar and basic rules

This guide is compiled from the Bladwijzer plant profile and pruning calendar.

Laden…