I am needing to thin out my iris this year and think I know enough to do it, and I'm also wanting to add a few new colors to make my row shine. I know to plant them shallow, and that they should be split in July, but does anyone have any other tips they'd like to share? My grandmother gave me these many years ago, so they're a family heirloom. I will be passing some on to my niece for her own first start. I'd appreciate any tips you'd like to share!!