British Columbia: Planting hedges before/after soil test results?

I am about to plant a few dozen Portuguese Laurels, and I made the mistake of assuming the results from the basic soil tests would be available in 2 or 3 days. Instead I learned that the results will take 2 to 3 weeks, and I just dropped off the samples. I'm a bit frustrated because I was all ready to go, and now I'm wondering if I need to remain idle until early October. I'm guessing it would be unwise to start planting without the results in hand since I would miss an opportunity to correct any imbalances that may be present by amending the soil a particular way. But since I'm an absolute beginner I thought I'd ask here to confirm.
TIA

 

I think, that most important soil parameter for the Portuguese Laurel is pH, that should be acidic: 5 to 6.
You can (and possibly should) always correct any nutrient imbalances when those plants are already growing onsite.

 

Portugal laurel is a weed in this ecoregion - I wouldn't worry too much about it being able to grow in local soils. Also each pH point is thousands of increments greater or lower than the next, it takes a lot of chemical alteration to achieve even a single point difference. And because such a change is so significant making these changes in short periods of time is highly disruptive to the soil system.