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My Calla Lilies won’t flower. I have had about a dozen for several years, all flowered the first year & since maybe one or two have flowered occasionally. I have tried several places in the garden – full sun, part shade, pots .

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Calla’s can be tricky! They are quite gross feeders, and don’t appreciate being moved unless they are dormant. They do like full sun, but need to be kept damp – but not soggy. Pots are fine, so long as they are repotted after 6 – 9 months. Also, the tubers need to be at least 3 – 4+ cm across to flower – so if there is any disease occuring in them, (its called erwinia or soft rot – the same as potatoes get and it smells rancid!) the larger tubers tend to succumb and then there aren’t any flowers. All you can do to help with this is to spray / drench them with Copper oxychloride to help toughen them up, it won’t kill the disease. However, if you think the tubers are still large, then it is possible to stimulate flowering with a growth hormone which you should be able to get from your local Palmers store. This is normally applied just before they are planted.

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