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Care for perennials

We want to inspire everyone to grow more and enjoy the art of gardening in their own gardens. Through the Piet Oudolf Collection we are bringing you fresh plant combinations, put together by Piet Oudolf, inspired by the projects he has worked on across the world. Here we share some basic growing tips and plant advice but if you need any further information or if you have any questions about any of our products, please get in touch on

Planting rules

Make the planting hole, on average, twice the size of the root ball width.

  • Dig out the planting hole using a trowel or spade. Add some organic fertilizer and mix it well with the soil you have removed.
  • Take care not to plant perennial plants and grasses too deep – all growth should be visible above ground.
  • Using the improved soil you have removed, refill the hole around the plant and press the soil around the plant firmly with your finger tips or feet (depending on size).
  • Water newly planted perennials well and continue to water until established.

Pot-grown plants in the Piet Oudolf Collection are suitable for planting out year-round, unless the ground is frozen or you are expecting hard frosts.

Advice for grasses

Most grasses are perennials. They are strong and very hardy. Top growth will die back in winter and in spring new blades of grass will begin to shoot from the base of the plant. In most species the dead leaves will remain upright in winter meaning they are still very decorative, especially with a layer of frost or snow. It is preferably therefore if you wait until spring to cut the old growth back. New blades will appear from late February / early March. Another reason to wait until spring to cut back grasses is that rainwater can gather and sit in the cut off stems which can rot the base of the plant.

Compost with perennials

Sandy soils can be improved by mixing compost through the top layer of soil. The soil becomes more cohesive and can absorb more water. Clay soil will also benefit greatly from regularly added compost – its structure will become looser and will therefore be lighter. A loose, free drained soil structure is important because roots not only need food and water but they need to room to breathe and grow. To supplement home-made compost, most perennials benefit from the addition of manure to ensure they have adequate nutrition.

Soil improvement

 Een gezonde leefomgeving heeft een gunstige invloed op de weerstand van mensen en dieren. Dit gaat dus ook op voor planten. Eigenlijk is het niet gek dat een hongerige plant last krijgt van meeldauw of roest. Doordat gebrekziekten zich ontwikkelen, kunnen plaagbeestjes aanvallen en infectieziekten toeslaan. Voorkom plantenleed door de groeiomstandigheden te verbeteren:
  • Verbeter de structuur van de grond met compost, organische bemesting, en geef eventueel extra water bij langdurige droogte. Verwijder regelmatig concurrerende planten (meestal onkruid).
  • Zandgrond kan verbeterd worden door compost door de bovenste grondlaag te mengen. De grond wordt zo meer samenhangend en kan meer water opnemen. Kleigrond wordt juist losser van structuur als er compost wordt toegevoegd en zal daardoor luchtiger worden. Omdat wortels niet alleen voedsel opnemen maar ook ademhalen, is de luchtigheid van de grond heel belangrijk voor het welzijn van de planten. Door wat extra koemest door compost te mengen, zijn de planten verzekerd van voldoende voeding.
  • Maak het leefklimaat in de tuin aantrekkelijk voor vogels, vlinders en andere nuttige insecten. Hoe meer natuurlijke vijanden, hoe minder kans op het uitbreken van plagen.
  • Voorkom wonden en andere beschadigingen aan de plant. Verse wonden zijn dé ideale toegangspoorten voor ziektekiemen, die zich verspreiden via wind en snoeigereedschap.
  • Laat een plant rustig groeien. Teveel kunstmest jaagt een plant op en dat zorgt voor stress.
  • Dat geldt ook voor een watertekort.
  • Pluk aangetaste plantdelen tijdig weg en gooi ze in de groene container (niet op de composthoop)!

Attract butterflies

With plants from Piet Oudolf Collection, you can create a butterfly-friendly garden. Butterflies are happy in a sunny garden to warm up their body and wings. They need flowers where they can collect nectar and they are particularly attracted to pink and purple flowering plants that provide scented nectar-rich flowers. Moths are equally beneficial – they are fond of gardens with varied vegetation.

Attract honeybees and other beneficial biodiversity with the Piet Oudolf Collection

Honeybees are essential in the garden. They fly from flower to flower and thus ensure the pollination of fruit. Unfortunately bees across the world are suffering but you can help by using the plants in the Piet Oudolf Collection in your garden! Just like us, bees need a varied diet. As they emerge from winter hibernation they will begin to look for food and water – make your garden attractive to these crucial pollinators by planting a varied palette of perennial flowering plants and grasses.

Discover the joy of gardening with the Piet Oudolf Collection

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