beaverpeeler >>> you have any tips for success for poor soil conditions?
It would be helpful if you were to know what makes your soil poor.
If you can... get a soil test to see what you're up against. A one time charge of about $35-45 is money well spent. A good soil test will show a graph of nutrient levels and what are lacking (or perhaps excessive) plus tell you a couple of important things like pH and organic matter content. The good tests will tell you what to do as well.
Get the pH in the 6-7 level (slightly acidic). This is more important than anything. Make sure you have dug a good hole and don't add anything into the backfill unless you have heavy clay soil and then you probably have to add some well composted manure or peat. In general adding compost as a mulch is helpful and adds a lot of micronutrients as well as small amounts of NPK (nitrogen, phosphorus, and potassium). Plus it helps to hold weeds back and retain soil moisture.
I see that in the pics you have one year whips. One always need to prune back at least half to 2/3rds of the whip so that there is a reduction of transplant shock. (Root capacity was reduced when dug from the nursery so the top also needs to be reduced to be in balance).
And finally if your soil is generally just poor mountain soil; rocky and sandy, consider adding some home-made biochar. Not enough time to type out all the benefits of biochar so google it and how to make it. It can also be bought from high end garden supply outfits.