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Zantedeschia
I have got conflicting information about these. One web site said plant them in the pond and another says do not let them get too wet. I have some on the hardy ones I grow in my bog garden but are all the varieties grown in the same way?
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It depends on whether you have the hardy or the more tender varieties. This info on the RHS website should help - https://www.rhs.org.uk/advice/profile?PID=177
The large growing Zantedeschia aethiopica is the white flowering form commonly seen in gardens ; this flourishes in normal garden soil providing it doesn't get too dry . My own plant of this species came from a local garden , and was growing in a sunny border in the proximity of pine trees (!)
The more 'colourful' varieties are commonly seen in florists and garden centres ; these (I've found) are more tender and seldom seem to survive a winter outdoors . By all means grow them in large pots (or plant out in the summer) , but I would be inclined to stand them in a cool greenhouse for the winter .
Hope this info is of some use to you !
Dear all
Thank you I was rather surprised to be told that they are all hardy in a pond as long as it doesn't freeze as I grow my Zantedeschia aethiopica in my bog garden and they grow about 75cm tall.
they're not. I grew some hard one on my pond edges in my Belgian garden but a -20C frost saw off the lot. Unlikely to get that in the UK tho.