I just noticed this same exact thing for the first time just this week with a P. Pungens about 3-4’ tall that had been in the ground 3 -4 years. Totally wobbly. Cant figure it out as this is the first time in 5.5 years and 200+ conifers later that I have noticed something like this. It wanted to lean a certain way so I will probably put a stake in and tie top part to stake in opposite direction so it doesnt settle in at an angle. No idea why as it appears to be just this tree. Ive got major moles on my property but this did not appear to be the cause as their was no tunnel going to the tree and no mole hills nearby (I get new mole hills daily, they dont bother me and soil aeration is a benefit imho). Im stumped too.

No moles here (not to my knowledge anyway). The only lean/tilt seems to occur when I apply pressure to the soil right around its trunk/base -- any further away and it doesn't move/give much (if at all).

Am pretty sure the roots were splayed out when it was put in the ground. The soil's on the sandy-loam (quite coarse sand in fact) side -- figure that's alright w/w drainage being desirable and all... and it doesn't look like any of the surrounding soil has washed away (the base's settled in at more or less the same depth as when we planted it, and i don't think it was planted too high/shallow either)

Some neurosis notwithstanding, I'm mostly just curious why it seems to be so free/shaky right around its base. Not sure if the variety's got something to do with it... the rosemary hedge nearby is planted in the same sort of soil, and they appear to be firm/settled enough.

Some neurosis notwithstanding,

==>>> lol ... i was wondering about fixing something that isnt broken ... lets tread lightly .. see what i did there.. lol ...

how big was it at planting ... did you bare root ... how different was the media from surrounding soil ... i see you gave most of those answers directly above ...

i think my best advice is to let it settle over winter ... and then.. basically leave it alone ...

if the plant is growing just fine ... whats to fix????

ken

Most woody container grown plants presented to the retail market in my area are root-bound. With there often being a tight knot of roots right in the center, dating back to when these were left in small bands or pots for too long at the production facility. I'd be willing to bet both the juniper and the spruce mentioned on this thread have deformed roots somewhere inside their root masses, so that it may take them years to stabilize themselves. With the spruce perhaps being bad enough that it is still struggling to get a firm grip on the ground even 5 years after planting.

For instance I once had several foundation shrubs topple under snow loads here, after being in place over 20 years. When dug up these turned out to have small turnip-like knots of roots underneath their main stems, with only a small number of additional roots ever having managed to escape this initial severe deformity.

Resulting, again, from extended confinement to small pots way back in their early years.

The Myth of Fragile Roots

Containerized materials, especially those in gallon sized pots, often have serious root problems as a result
of poor potting-up techniques. Potbound plants exhibit circling root systems, which if not corrected
become woodier and more troublesome the older they get. Eventually these circling root systems become
girdling roots, which can lead to the early death of otherwise healthy trees and shrubs. At transplant
time, a more aggressive approach to root preparation can discover potentially fatal root flaws. Circling
roots, J-hooked roots, knotted roots, and other misshapen roots can often be corrected by careful pruning.
In this manner it’s possible to remove those root problems before they threaten the survival of your shrub
or tree.

https://s3.wp.wsu.edu/uploads/sites/403/2015/03/fragile-roots.pdf

To be quite honest,

8 months is not enough time for any woody plant to reestablish a complete root system.

That could take 2 years or more.

Did you really plant it in February?

Really appreciate the feedback.

Guess I didn't properly nail the keywords re "well-established" and "woody plant/perennial" when I initially attempted to look this up, so am actually quite glad to have things cleared up for me.

Looks like 8+(ish) months is indeed a kind of baseline for any sort of substantial (substantive?) rooting/establishing to occur. This -- due, by and large, to rampant inexperience -- had pretty much escaped me.

The timeframe I provided in the original post could've been more... ironclad... too: the clearest (visual/photo) evidence I've @ hand suggests planting took place circa mid-to-late March (so more like 6 months vs the stated 8).

All things considered, am gonna take/paraphrase ken's counsel and sit pat w/ a less anxiety-addled "if it ain't broke" mantra.

Thanks again for the examples/info/advice.