Cutting back pampas grass: timing & procedure

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Pampas grass is extremely vigorous. In order for it to bloom abundantly year after year, it must be skillfully pruned. We'll show you how to do it.

Pampas grass in the garden
The pampas grass looks particularly impressive in small groups [Photo: Peter Turner Photography / Shutterstock.com]

Ornamental grasses have been back in vogue in our latitudes for several years. They beautify our front gardens and balconies in their own very special way. Above all there is a great demand for representatives of the genus Pampas grass (Cortaderia), here especially after the American pampas grass (Cortaderia selloana). Because the enormous ornamental value in the garden is undisputed - even when it is dried out in winter. However, so that the ornamental grass can sprout again and vigorously after winter, it should definitely be cut. However, if it is not known exactly how this works, fatal errors can also occur here, which in case of doubt can even endanger the life of the pampas grass.

Very tall pampas grass in front of a house
Cortaderia selloana grows so high that it can be used as a privacy screen in summer [Photo: Hecos / Shutterstock.com]

Do you have to cut pampas grass?

Pampas grass doesn't need a lot of maintenance. However, in order for it to develop properly, it should be radically pruned in the spring. Since the plant always sprouts from the mother plant, i.e. forms a so-called eyrie, enough space must be created for the new shoots. This is the only way for the grass to develop optimally. In late autumn or at the beginning of winter, the leaves of the pampas grass dry up. However, they do not fall off by themselves and should by no means be cut off in autumn. It is better to tie the shoots together in the upper area before the first frost. So your pampas grass gets a first winter protection through the protective leaves.

Attention: Even when withered, the sharp-edged leaves can still cause cuts. Please always wear sturdy gardening gloves when working with the pampas grass.

Pampas grass covered with snow
After winter, the dried leaves must be cut off [Photo: Ian Grainger / Shutterstock.com]

When should you cut pampas grass?

Pampas grass should always be cut in spring when the days have become frost-free. The inside of the stem of the pampas grass is hollow. If you were to cut your pampas grass in autumn, water would collect there and the plants would not like it at all. They would rot and the frost would have an easy time with a large, unprotected attack surface.

Cut the pampas grass when the first shoots can be seen

The first shoots of the new year sprout from the eyrie of the mother plant in early spring. As soon as the young shoots have reached a length of around 10 to 15 cm, you can cut off the old leaves or shoots that were tied together in the previous year above the new shoots. Depending on the weather, and thus depending on the time of the new shoot, the plant can be cut back from March to May.

Radically cut back pampas grass
As soon as the young shoots are 10 to 15 cm long, the old leaves above the new shoots can be cut [Photo: Hecos / Shutterstock.com]

How to cut pampas grass?

It is worth preparing a few things for pruning the pampas grass. The leaves of the pampas grass are very sharp and some even have barbs as a protective mechanism. Be sure to wear a long-sleeved top and long pants. Cut-resistant gardening gloves and protective goggles protect you from all possible dangers. Sharp secateurs are sufficient as a cutting tool.

To cut the pampas grass in the spring after the last frost, first loosen the tape with which you tied the ears and leaves together in autumn. Now grab one after the other small bundles of leaves and stems just above the plant eyrie and carefully cut them off at a height of about 20 cm. Please pay attention to the new shoots that are already showing so that they are not damaged. The new growth now has enough space and also gets enough light. Nothing stands in the way of a beautiful new bloom.

Pampas grass stalks
The leaves are sharp: be careful when cutting them [Photo: ClaudiaMMImages / Shutterstock.com]

On what you at Planting pampas grass have to pay attention, find out here.

tip: In addition to pruning, you should also fertilize your pampas grass in spring. For this we recommend a primarily organic long-term fertilizer such as our Plantura Organic universal fertilizer.

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