Now that explains the pretzels, um I mean pre yamadori in your garden!



Yes I try to go easy. Remember these were in pots for 3 years with roots regularly trimmed before they went in the ground. They had a very fine fibrous root system at that stage but because they have evolved to grow in sand, it's in their DNA to put down true tap roots to find clay deep down under the sand - which they soon did after transplanting to the ground. Unfortunately, I have discovered that the production of the tap roots supresses the vigour of the lateral roots almost completely. (BTW that's why you seldom see a nebari on them in nature) Now that I'm more aware of exactly how they grow. I'll be able to manage them better.Boics wrote:Hi Mike.
I think it's PeterH that said once you reduce your root mass to take to put culture then they are fine.
So I think you should go easy on the pruning and reduction.
I know Grant said that warmer is better but I also lost one in a hot summer repot.
Perhaps my after care we not good enough?
I've another one (I love LL) right now and I'm taking the migration to small pot culture slower and won't repot in full Melbourne summer again.
PS they look great and I'm most interested to see the refined results!
Would planting in colanders (still in the ground) be a method to help reign in the tap root issue or is that just counter intuitive?? I guess you really need to cut the tap roots rather than simply inhibit their growth in order to stimulate lateral root development? This is a very interesting thread - thanks for posting your experiences.treeman wrote: Yes I try to go easy. Remember these were in pots for 3 years with roots regularly trimmed before they went in the ground. They had a very fine fibrous root system at that stage but because they have evolved to grow in sand, it's in their DNA to put down true tap roots to find clay deep down under the sand - which they soon did after transplanting to the ground. Unfortunately, I have discovered that the production of the tap roots supresses the vigour of the lateral roots almost completely. (BTW that's why you seldom see a nebari on them in nature) Now that I'm more aware of exactly how they grow. I'll be able to manage them better.
Thinking about it, the Japanese had similar problems extracting shimpaku roots from deep narrow cracks in the rock and coming out with enough root to keep them alive. Many many shimpaku were lost for the same reason.
treeman wrote: Only about 10 or so left alive from about 60 odd from this first batch.
It's from cutting the tap roots with a sharp spade and just assuming there were lateral roots when there were none!!!!!!!!!!!!Rory wrote:treeman wrote: Only about 10 or so left alive from about 60 odd from this first batch.Thats really low. Is that from the severe pruning, bending/snapping, or something else?