Cultivate buddleia successfully in a tub

Cultivate buddleia successfully in a tub

The most beautiful mini summer lilacs for the bucket

However, not all varieties are suitable for keeping in a bucket. Both Buddleja davidii and Buddleja alternifolia, the two most commonly cultivated species of Buddleia, are on average up to three meters high and two meters wide - much too big for traditional pots, and the bushes also grow very quickly. However, there are a number of specially grown dwarf buddleia that only grow up to 150 centimeters high and are therefore just right for a planter:

  • 'Purple Emperor': purple-violet flowers
  • 'Buzz ® Violet': light purple flowers, slightly overhanging shoots
  • 'Summer Lounge': blooms in white, pink or purple, only up to 60 centimeters high

also read

  • Buddleia requires the greatest possible planting distance
  • Summer Lilac Growth Per Year - How Big Does It Get?
  • Space-saving eye-catcher for pots and gardens: Buddleia as a high trunk

In addition, there are non-hardy and smaller species that can only be kept in buckets anyway. These promise a special eye-catcher on the balcony and terrace: keep an eye out for the summer lavender (Buddleja globosa) and the yellow summer lavender (Buddleja x weyeriana) in the garden center.

Plant and care for buddleia

So that the summer lilac also feels comfortable as a container plant, it needs a suitable location. A bright, sunny and warm place is ideal. If necessary, you can also place the plant in the light shade, but there it will not bloom as profusely and for as long as in a full sun.

Choosing the right planter

Even a mini buddleia needs space, so the planter should be at least 40 centimeters both in diameter and in depth. If possible, choose clay, ceramic or the like as material so that the roots do not heat up in the hot summer sun - especially clay pots cool. Plastic pots, on the other hand, are rather unsuitable.


Classic, pre-fertilized flower or tub plant soil is too rich for buddleia. However, if you mix this with expanded clay (€ 17.50 at Amazon *) and / or gravel in a ratio of 1: 1, the substrate should be lean and permeable enough. A drainage layer a few centimeters thick on the bottom of the pot is also important to prevent waterlogging.

Pot the buddleia

If you bought the buddleia as a container plant, you can basically pot it all year round. It is best to proceed as follows:

  • Clean the planter carefully.
  • Place a pottery shard over the drain hole on the floor.
  • This prevents clogging with substrate.
  • Now fill in a few centimeters of expanded clay.
  • This is followed by the mixed substrate, about halfway up the pot.
  • Carefully remove the plant from the container.
  • Gently shake off the old, clinging earth.
  • Check the plant, especially the roots, for damage.
  • Plant the buddleia in its new container.
  • Fill in the other substrate, press it down well.
  • Tap the bottom of the pan a few times on a hard surface, e.g. B. on the table.
  • This will also fill the gaps.
  • Water the buddleia well.

Carefully care for buddleia as a container plant

In terms of care, please note the following:

  • Water regularly, but avoid getting wet.
  • Apply liquid potted plant fertilizer every two weeks.
  • Regularly remove faded.
  • Before the first frost, pack the pot so that it is winterproof.
  • Place the plant on a heat-radiating wall for the winter.
  • Optionally, a cool but light wintering in the house is possible.


In late winter - around the end of March / beginning of April - Buddleja davidii is severely pruned, as this species only flowers on the new shoots.