Crocosmia × crocosmiiflora
|Crocosmia × crocosmiiflora|
|Species:||C. × crocosmiiflora|
|Crocosmia × crocosmiiflora
Crocosmia × crocosmiiflora is a garden hybrid of C. aurea and C. pottsii, first bred 1880 in France by Victor Lemoine. This hybrid is known to gardeners as "Montbretia." Cultivars within C. × crocosmiiflora include:
- 'George Davidson' Yellow 
- ‘His Majesty’ Flowers large, orange.
- 'Jackanapes' Flowers orange-red, inner lobes golden yellow.
- 'Meteor' Orange yellow
- ‘Solfatare’ Yellow flowers with bronze foliage.
In the United States, Crocosmia × crocosmiiflora is considered suitable for planting in hardiness zones 5-9, but in more northerly locations it can be planted in the spring and the corms dug out in the fall. The corms should be planted in a well-drained garden soil in a full sun to partial shade. The hybrid will set viable seed that can be grown from seed as soon as ripe, but as a hybrid will not breed true. In Belfast, Northern Ireland it is recorded as well-established in a wide range of locations.
Crocosmia × crocosmiiflora is deemed an invasive plant in New Zealand, common on roadsides in the northern parts of the West Coast of the South Island. The New Zealand Department of Conservation classes it as an environmental weed.
Crocosmia × crocosmiiflora grows to 90 cm high with long sword-shaped leaves, shorter than the flowering stem and arising from the plant base, ribbed and up to 20mm wide. The base is a corm, a swollen underground stem lasting one year. The flowers are up to 5 cm long and coloured deep orange.
- Parnell, J. and Curtis, T. 2012. Webb's An Irish Flora. Cork University Press. ISBN 978-185918-4783
- Everett, T.H., ed. Montbreitia, In: New Illustrated Encyclopedia of Gardening, Greystone Press, New York, 1960. pp. 1181-1182.
- Royal Horticultural Society
- Planting Instructions, Garden State Bulb Company, Vineland, NJ. 2017.
- Beesley, S. and Wilde, J. 1997. Urban Flora of Belfast. The Institute of Irish Studies, The Queen's University of Belfast. ISBN 0-85389 695X
- Howell, Clayson (May 2008). Consolidated list of environmental weeds in New Zealand (PDF). DRDS292. Wellington: Department of Conservation. ISBN 978-0-478-14413-0. Retrieved 2009-05-06.
- Clapham, A.R., Tutin, T.G. and Warburg, E.F.. 1968. Excursion Flora of the British Isles. Cambridge University Press. ISBN 0-521-04656-4
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