Thank You for showing so many aspects of ´Tessera´growing in Your garden, Marie-Rose! It´s good to know that it may take several years to show its full potential.
2008 I planted some G. peshmenii, but they succumbed to the harsh winter 2011/12. Probably my soil isn´t well enough drained, too. What about the positions where You managed to grow G. peshmenii in the border, and which minimum of temperature did they stand?