Lomandra longifolia 'Katrinus Deluxe'

Summary

We have evaluated different Lomandra species and cultivars in both sun and shade, and 'Katrinus Deluxe' performed beautifully in Davis in the shade. It was less vigorous in Irvine with the use of reclaimed water. 'Katrinus Deluxe' has long, grass-like leaves with a loose blousy appearance in the shade. The characteristically spiky flower stalks of mat rush are golden and held high enough in 'Katrinus Deluxe' to be a real feature that contrasts with the bright green foliage. Though not a heavy bloomer in the shade, the yellow flowers were a notable feature throughout the growing season. While 'Katrinus Deluxe' appeared to respond positively to higher levels of water in Davis, plants on low water still scored an average of very good overall appearance throughout the season, earning it our Blue Ribbon™ award for high performance on low water. For this reason we are comfortable recommending this be irrigated at the low water level in WUCOLS Region 2.

'Katrinus Deluxe' did not fare as well in Irvine. Plants were not very vigorous, flowered very little, and many had pale yellow foliage which may be due to the use of reclaimed water. There was also some rabbit predation early on that may have affected growth and vigor. Their overall appearance scores were never consistently acceptable. The only significant differences in the data between irrigation treatments was slightly smaller growth on the low compared to the moderate irrigation level. It would be interesting to re-evaluate this cultivar on potable water in a follow-up trial. Since no quality differences were found, we would recommend the low water category for this cultivar in WUCOLS Region 3, though without reclaimed water for better health.

Growth and Quality Data

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