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they dont tend to winter very well either ,, short cool days are not conducive to reveging...
Hi Donald, perennial doesn't mean necessarily re-vegetation all year, it means mainly that the plant survive a dormancy phase and then re-veg! So with a frost free location like at the equator is it theoricaly possible? Then in practice the trim or tip prune before the dormancy have to be carefully done like the vine.
(The altitude parameter is also important to study imho).
Well even at a temperate and dry location with a good mulch during the winter is it possible? Not impossible i would say, but surely depends on the genetics used, with landraces from the tropics or equator maybe it works better but of course an acclimatization is first necessary!
Here is an example of an easy Swazi re-veg mother plant indoor.