Planting rooted blueberry starts

Two blueberry starts (out of have rooted and I need to plant them.  I was going to plant them on a south-facing slope to help protect them through our cold winters.  Last year, we had 3 that rooted and I planted them in veggie beds and none made it through winter.  I have 2 barberry plants behind this new space to provide wind protection from the north.  But my husband says if we plant them there now, they will get baked with our over 100 degree temps.  They are currently in sand medium in slatted plastic containers and I don't think I can leave them until fall and should plant them now or soon.  My husband thinks they won't like being planted now and then moved again in fall.  We are in Boise zone 6B.

In the past I planted blueberry plants on a south facing slope in deep sandy soil because it was close to the house.. I just could not keep them watered enough and they died before they could produce.  when I received the request to answer your question I remembered I need to pick the blueberries so I will take a picture to show what succeeded.  these are at the bottom of the sandy slope where the clay layer is about 16 inches down and it remains damp on the top of the clay layer.  I empty the lawnmower grass catcher around them to keep the soil rich and cool.  They were small plants when I put them in but they have doubled their growth each year in this position.  If you are planting in summer heat put up a shade wall to the south west of them so that they only get sun in the morning.

Thank you for your helpful info.  I don't think I will plant it on that south-facing slope after all.  I am wondering about planting each start in a small pot for the summer and keep on afternoon shaded back deck.  But then can I transplant them again in the fall into the ground?  Or maybe I should bury pot they are in into the ground.  I did that with a small mulberry start I bought this past winter and it lived but I read that mulberries are hardy plant starts, not sure about blueberries.

A buried pot protects the roots from heat or cold and sill maintains the ability to transplant with minimum root disturbance.  A fabric pot in a shallow water source protected from the sun also works well. Multiple pots can wick water from the same container.  I am currently writing about critical thinkin verses prescriptive thinking. Critical thinking matches a finding with the best over all solution for the circumstance while prescriptive thinking  just matches a condition with a listed prescription which may not work in the circumstance.  so you are doing well in thinking out your options.

Hans Quistorff wrote:A buried pot protects the roots from heat or cold and sill maintains the ability to transplant with minimum root disturbance.  A fabric pot in a shallow water source protected from the sun also works well. Multiple pots can wick water from the same container.  I am currently writing about critical thinkin verses prescriptive thinking. Critical thinking matches a finding with the best over all solution for the circumstance while prescriptive thinking  just matches a condition with a listed prescription which may not work in the circumstance.  so you are doing well in thinking out your options.

I might just do this since mine are now in large pots because they were all struggling in the soil.

Im curious about the best ways to kerp their soil acidic.
Any key non_ commercial tips??

I'm curious about the best ways to keep their soil acidic.
Any key non_ commercial tips??

Constantly adding compostable mulch.  In my case emptying the lawn mower grass catcher around them frequently.

for best results with blueberries prepare planting spot with an equal mix of peat moss and sand soil,if that's the soil type you have, or equal parts peat moss, sand and top soil from where you're at 2'-3' deep. blueberries need an acid soil that's well drained. acid soil is a must for successful blueberry plants. im assuming that you have high bush varieties rather than rabbit eye. but they both need acid.
transplanting when plants and your local flora are in dormancy is the gold standard.