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North Yorkshire, United Kingdom Gb

Is there any way of finding out which perennials die back due to cold weather and which die back due to lack of daylight hours? We have had a prolonged summer up here and there are no signs of Autumn yet and do Autumn flowering 'crocus' , schizostylis and amaryllis belladonna need cold weather to flower? Thanks.



not so sure really but our colchicums and schizostylis are flowering. the latter is initiated by light wavelength so my understanding goes. the flower for the colchicum is laid down in the spring when the foliage is doing its thing.

27 Sep, 2016


I'm in the midlands and my colchicum are more or less over....
They flowered even though its been warm so I guess at day length

27 Sep, 2016


Amaryllis belladonna doesn't need cold to bloom, but hot, dry weather in summer often improves flowering.

28 Sep, 2016

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