Accurate Growth Rate Info
We all know there are multple sources to find growth rate info but at the end of the day there are some cultivars that are a little less known therefore you end up finding quite the range.
So...I have a plant in its container awaiting placment, can I in theory observe the previous year's growth (or current year's growth) and assume that is the actual growth rate of the plant sitting in front of me? I understand there are other variables in play regarding how the new enviroment will effect its growth rate but it needs to go somewhere and can always move later.
I'll take Picea pungens 'Royal Knight' for example. There are several folks here that have this plant and have observed 3-4" of growth. Then there are some sources online saying its closer to 9". Thats a huge difference if you ask me. I even asked the grower and he gave a growth rate of 6". Then the plant arrived and it looks closer to 3-4".