Iris germanica, the German Iris, is a species in the genus Iris.
Iris germanica grows up to 120 cm high and 30 cm wide. It is a European hybrid, rather than a true wild species. The roots can go up to 10 cm deep and it is a rhizomatous perennial that blooms in April to June. If is known to produce the isoflavone irilone.Hundreds of hybrids exist representing nearly every colour from jet black to sparkling whites, except bright scarlet. Varieties include I. g. var. florentina and I. g. var. germanica.
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Lifting, dividing and replanting the rhizomes is best done once flowering has finished as this is when the plant grows the new shoots that will flower the following year. The rhizomes are placed on the surface of the soil facing towards the sun and with at least 45cm of open ground in front of them - this allows two years growth and flowering. The plant is held in place by removing half the leaf mass to reduce wind rock and by using the old roots as anchors in the soil. The rhizome is placed on well dug ground and the roots placed either side into 10cm deep grooves. The soil is then gently firmed around the roots, so holding the plant steady. New roots and leaves are created rapidly as the rhizome moves forwards.
Clonal colony of Iris germanica
- "Iris × germanica L. is an accepted name". theplantlist.org (The Plant List). 23 February 2012. Retrieved 25 November 2014.
- "Garden Bearded Irises". Pacific Bulb Society. Retrieved 25 November 2014.
- Lipase-catalyzed regioselective protection/deprotection of hydroxyl groups of the isoflavone irilone isolated from Iris germanica. Nighat Nazir, Surrinder Koul, Mushtaq Ahmad Qurishi, Subhash Chandra Taneja and Ghulam Nabi Qazi, Biocatalysis and Biotransformation, 1029-2446, Volume 27, Issue 2, First published on 2 December 2008 Pages 118–123
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