March care

Pampas Grass in March: monthly care

Month-by-month careCortaderia selloana

In March your pampas Grass needs attention: prune.

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  • Prune
Pampas Grass (Cortaderia selloana)
Foto: Onbekend / Wikimedia Commons / CC BY-SA 3.0

What to do this March

Prune

Pampas grass requires only one serious prune each year, carried out in March before new growth emerges. This timing is critical: prune too early in winter and you remove the protective insulation the old foliage provides to the crown during cold snaps; leave it too late and you risk damaging fresh shoots. The old leaves and spent plumes look attractive through winter, providing structure and catching frost, so there's no need to rush. In March, cut back the entire clump to about 30–40 cm above ground level. Wear tough gloves, long sleeves, and eye protection—the leaf edges are razor-sharp and can cause nasty cuts. Use sturdy bypass secateurs for thinner stems or a pruning saw for older, thicker clumps. Some gardeners tie the foliage into a manageable bundle with string before cutting to make handling easier. If the clump is very large, hedge shears or even a powered trimmer can speed the job, though take care not to scalp the crown. Remove all the cut material from the garden; don't compost it unless your heap gets very hot, as seed heads can remain viable. After pruning, rake out any dead material trapped in the crown to improve air circulation and reduce the risk of rot. You may also remove any damaged or dead sections from the outer edge of the clump at this time. Pampas grass doesn't require deadheading or other pruning through the growing season—simply let it develop naturally and enjoy the spectacular plumes from late summer into autumn.

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