How Deep Do I Plant Bud Union?
I am about to plant some roses that are in 1-gallon containers, and want to plant them at the correct depth. This year I had three roses not survive the winter after a very harsh February and cold spring. I had planted those roses last summer, and they seemed well-established by autumn. My other roses that survived fine were either a new Darlow's Enigma (very tough), or were roses that had been there already for years. I am wondering if the ones I planted last summer were not planted deep enough. I've heard differing things about the bud union planted more shallowly benefits by getting more oxygen, or conversely, benefits if it's buried more deeply to protect it. Which is right? How deep should I plant the bud unions?
P.S. I tried to do a Search on this Forum, but it looks like the search function is still not working.