Pat - dividing lily bulbs is a piece of cake. I suppose you can do it any time you want. not literally "ANY TIME", as in, middle of summer, I mean, whenever you feel you want to increase the number of plants or any time you feel you need to clean up the dozens of little off shoots. whenever you decide to do it, its best to do it in late fall, just as the stems are starting to die back. if the bulbs have been in the ground for several years, they will resemble what looks like a human brain. literally. it will have two (or perhaps three...? although ive never seen one with three), "halves", a right brain and a left brain, with a center "groove" running down the middle. simply split/break it in half along this groove. period. replant in fall to give them time to grow a few roots prior to going dormant. as far as offset removal is concerned, simply pluck them off. eventually they'll turn into huge, brain looking bulbs themselves!
