Syngenta Flowers Business International Cyclamen Brochure 2…

Cultivation Advice Alter temperature setpoints according to light levels. In fall and winter light levels generally are low and temperature setpoints are best decreased for optimum plant quality. Please note that lower temperatures will increase culture time.

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Not recommended gibberellic acid will accelerate flowering but can result in soft stems and distorted flowers.

Aphids, Thrips, Cyclamen mites, Fungus gnats and Shore Flies can be vectors for Fusarium.



Thielaviopsis: old roots brown, tips white. Cylindrocarpon: roots from top brown & wet. Rhizoctonia, Sclerotinia: pale white leaf stem. Pythium, Phytophthora: roots black, soft rot. Insects: roots eaten. Other: Botrytis, Fusarium, Erwinia.

No spacing for the first 3 to 4 weeks after potting for a better micro-climate. Spacing after this time will improve the quality of the plant, keeps it compact gives early flowering and improves resistance to diseases. Space the plants in time before they touch each other. That way the plant grows round and compact and the leaf stems remain shorter and stronger.

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Fertilization & Substrate

During the first growing period the plant needs to develop many leaves. With more leaves the plant becomes stronger and more flowers can be produced. Therefore, it is advisable to add a bit more nitrogen in the fertilizer during the first growing stage. The optimal proportion of N:K is 1:1 (15-5-15). The first growing phase takes approximately 8-12 weeks after potting, depending on size and variety/type of the young plant. In the second growing period the plant develops flowers buds and flowers. In this stage potassium is an important element to keep the plants compact and strong as well as to develop stronger flower stems and flowers. Also, Calcium and Silica have a positive influence on the quality of the flowers.


Cyclamen require a light intensity of around 40,000 lux. Shade at 50,000 lux. Recommend whitewashing of the glasshouse or shading screens. Too much shading generally reduces the number of flowers and should be regulated properly to avoid that the leaves become too soft and can easily wilt.

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Keep in mind that smaller pots have little water retention capacities. Watering therefore should be done more often than with larger pots. When the days are getting shorter continue with an irrigation every 2 to 3 days. Avoid getting the plants too wet. There are several ways of irrigation: from above using sprinkler, through drip or via ebb and flow systems. During the first growing period it is easy to irrigate from above. In the second growing stage this will be harder since the leaves cover the pot ball and irrigation is therefore uneven. As soon as flowers appear, we advise not to irrigate from above. The flowers will get “dirty” and may develop Botrytis. This reduces the ornamental value.

Tips & Tricks

Choose a pot with many holes for drainage and use potting soil with sufficient air for good development of the roots. Do not plant the corm too deep when transplanting. Plant the tuber just under the soil with the heart of the plant and the upper side of the tuber just above the soil. By doing so the heart of the plant develops better and the leaf stems remain strong.



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