Calla Lily: the Houseplant of June 2020

The story behind the Calla Lily
Like the Anthurium and the Spathiphyllum, the Calla Lily - officially called the Zantedeschia - is part of the Araceae family and is characterised by the pitcher-shaped bract (spathe). The actual flowers, on the spike, are tiny and less eye-catching. Zantedeschia’s great popularity has particularly been caused by the big expansion in the summer and autumn-flowering range. 

Many arums have a preference for swamps. Zantedeschia species are also swamp plants that embed themselves firmly in the banks. The arum originates from southern Africa as far north as Malawi, and often grows in places where rainwater drainage is obstructed. These are periodically saturated swampy spots, but they only exist for relatively short periods. The plant can easily survive subsequent long periods of drought. 

Zantedeschia was originally called Arum aethiopicum or Ethiopian arum lily. At that time (18th century) western Africa was largely unknown and Ethiopia stood for almost the whole of Africa. The plant was also named Calla aethiopica, whereby 'Calla' is Greek for ‘beautiful’. The name ‘Richardia africana’ was also used, after the French botanist Richard. Ultimately they adopted Zantedeschia, after the Italian physician and botanist G. Zantedeschi (1773 - 1846). Aethiopica is Greek for 'growing in the land of the Moors' or 'scorched by the sun'. 

Zantedeschia is commonly called Calla, and arum is also still a widely-used name. In the past we were only familiar with flowers of the white Zantedeschia aethiopica, and they were particularly associated with mourning 

What to look for when buying Calla Lily

  • When buying Cally Lily it is particularly important to check the sorting: pot size, number of flowers per plant and the plant volume. The tuber size (diameter of the tuber in cm) determines the number of flowers that will be produced by each plant.   
  • It is also important to consider the ripeness; the plants should not be too unripe, particularly during the months with low light levels. The flowers can then struggle to develop due to lack of light.
  • Ensure that the plant is free of pests and diseases. This includes botrytis - a fungus that greatly detracts from the decorative value - on the leaves or flower. The tubers and the plant itself can be infected with bacteria, which manifests itself in slimy stems and the rapid decline of the plant. Beware of yellow or drooping leaves. 
  • A Calla Lily is best stored in cool conditions. The ideal storage temperature is 8-12°C, but always for as short as possible. If the plant is stored too warm, it will ripen more quickly, reducing the saleability. You should leave the plant in the sleeve during the shipping and storage phase in order to avoid drying out and damage. Make sure that the flowers and the foliage cannot get damp due to excessive humidity or from condensation in the cellophane. So only the potting soil should be damp. 

Calla Lily is most widely supplied in the spring and summer months. 

The Calla Lily range has expanded considerably in recent years, so that there are many colours and leaf markings available. Pink and yellow are most common colours, but the plant is available in various colours until September.

Within the range we distinguish between large-flowered and small-flowered species and cultivars derived from Z. aethiopica (with white as the main colour)

Calla Lily can be used as a houseplant and garden plant, and has an unusually long lifespan. Zantedeschia tubers or rootstock are increasingly being offered as ‘dry’ sales for use as ‘garden Callas’.

Care tips for consumers 
Calla Lily is easy to care for and can be enjoyed for a long time. 

  • Indoors the plant requires a light spot which is as cool as possible to ensure the longest flowering. 
  • The plant is undemanding in the garden - it can be placed in either the shade and the sun. The temperature must remain above 5-8 °C. 
  • The flowering time indoors is 2-12 weeks The plants can flower for longer outdoors, particularly when the temperatures are lower.  
  • Make sure the soil never dries out by watering regularly. 
  • Give plant food once a fortnight to ensure lavish flowering. 
  • The plants can potentially be retained for another year by giving them a rest period during the winter, whereby the plant is kept dry and the leaves will die back. The tubers will produce plenty of new flowers during the next growing season. 
  • Obviously the plants are only for decoration and not for consumption.

Sales and display tips for Calla Lily
Its often attractive bright colours mean that Calla Lily works very well in cheerful ‘handmade’ interiors. The plant, which already appears to be a mixture of local and exotic, looks fabulous in artisan pots with colourful ethnic patterns. The Calla Lily can also be placed in a simple earthenware pot, which looks attractive on the balcony or patio (a gift idea for Father’s Day).  The attractive shape of the spathe makes it a fabulous eyecatcher anywhere. The Calla Lily also combines readily with other green and flowering plants. 

Images of the Calla Lily
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Calla Lily poster:
You can download the posters free of charge using the links below. 

Poster Calla A1

Poster Calla A3


Calla Lily: the Houseplant of June 2020
Calla Lily: the Houseplant of June 2020
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