Hi Folks. I have been growing gladioli for a few years, but I have been lifting the bulbs each year. This year I got a bit lazy and left them in the ground, When they flowered this year they had changed color to manly red and some are white, Very few have kept there original color. Can anyone out there tell me why this happens. I had lovely colors ranging from greens to purple & pinks. Hope someone can tell me why this happened Thank you. Gilbert.