We've been in our home here for 18 years now, and when we moved in I said to myself "that banksia is in the wrong place" for various reasons. It was well established then but has never grown much , probably due to overwhelming competition from nearby palms and other larger plants. So a few months ago I air layered the top half of the trunk and last week finally cut it and planted it in a pot as it had produced some good roots into the sphagnum moss. Today I finished the job by digging out the bottom half of the trunk and planting it in a pot. It had a very thick tap root which I had to cut to get it out.
I thought it had a lot of fibrous roots as well, but on cleaning it up after digging it out I found that almost all the fibrous roots were from the surrounding plants

. On the pics you can see that not much in the way of roots remains. Can anyone tell me if the tree has much of a chance of surviving with the tap root cut short and so few other roots? Any advice or opinions would be welcome.
Cheers, Frank.
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