It will They can easily be pruned back on June or November time to or original plant and water in well. Awarded an AGM in the 2004 RHS Geranium trial. The story Geranium ‘Orion’ The star of the RHS trial of hundreds of hardy geraniums, this stupendous plant has large, lavender-blue flowers with red-purple veins and white eyes. Water Butts Join now and start creating your dream garden! 5 5 1 star 1 star 1 star 1 star 1 star (13 reviews) Write review. It’s perfect for planting in the middle of a sunny border or as ground cover, and it looks good with a variety of other perennials, including lavender and catmint. Masses of violet-blue flowers appear starting in May or early June. Like many geraniums, new leaves emerge as flowering winds down, ultimately pushing the … ‘Orion’ emerged as the best deep-blue on the extensive hardy geranium trial held at RHS Wisley between 2005-2007. ‘Rozanne’ At RHS Wisley ‘Rozanne’ (syn.