Interestingly, trees on the medium rootstocks (SJA, QA, MM106), which had struggled to survive for several years in my soil, started growing well as soon as they were transplanted into someone else's soil about 15 miles away (despite transplant shock).
A runted-out Victoria on SJA went from 3ft in size and 3 inches of growth per year to 10ft in size after a couple of years and 4ft of growth per year even though it had grass, weeds and other plants all the way up to the trunk in its new location.
The soil at the new site was heavy chalky clay which waterlogs (mine is light chalky gravelly sand which drains quickly) but at the new site trees were planted on a slightly higher piece of ground so they didn't sit in puddles when it flooded.
A runted-out Victoria on SJA went from 3ft in size and 3 inches of growth per year to 10ft in size after a couple of years and 4ft of growth per year even though it had grass, weeds and other plants all the way up to the trunk in its new location.
The soil at the new site was heavy chalky clay which waterlogs (mine is light chalky gravelly sand which drains quickly) but at the new site trees were planted on a slightly higher piece of ground so they didn't sit in puddles when it flooded.
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