Can anyone help me with a small problem i seem to have with my Polemonium 'Jacobs Ladder' Heaven Scent... I planted it back at the beginning of spring and it flowered beautifully until about 2 weeks ago (mid June) It has not only started to wither and die back but is covered in a chalky white substance. Is this normal? I figured it may just be the natural way that it dies back after flowering but im concerned as i cant seem to find any information on this. Every inch of the plant is covered in this chalk and if its not something that should be happening then of course i don't want it spreading to my other plants. Any advice???